Let’s say that damage boost was removed, what would you replace it with?
Same with rez, if it was removed what would you replace it with?
I personally like the idea of a cleanse or a ramp up.
The ramp up would basically increase her healing until she switches healing targets, which would allow her to ACTUALLY have the best single target healing.
something that increases firerate/charge rate would be nice
A 15% fire rate + 10% reload/recharge speed boost would be great.
More damage without changing health thresholds.
Damage reduction.
idk, CC immunity…
Or, increasing fire-rate damage reduction
Mercy kinda needs the damage boost
Making up for the fact that you’re essentially 5v6 when it comes to damage is pretty important.
More damage boost 
I think I’d be cool to give each character a different ability or fire action. Take Mei for example. It could give her a shotgun blast with less range or it could give Rinehart like a flame thrower. Of course I feel like doing this would be a better alternative to new characters but that’s just me. Oh it’d also have a visible cool down. 
If that’s the case, good luck killing a boosted bastion or pharah then.
This is a terrible idea. Rate of fire changes are the worst, whether it’s a buff or a nerf. It’s like learning the hero all over again.
Just change it to damage reduction.
well I’d try making res an underarm thrown projectile with trajectory similar to tracer bomb (still keeping wind up though) to make it have more skill expression for res. rn it’s simply more about everyone else rather than mercy’s own skill to pull off a res. making it an underarm throw means that good mercies can use ga to get to a certain height, angle and/or safe position to res an ally which won’t be possible in the current res.
but if res was to be removed entirely, I’d still keep the same ability as above (less restrictions on windup and lower cd) but aoe heals instantly some amount with a buff applied like “take x% less damage for y seconds”.
mery’s pistol but make her pistol have faster projectiles (and reduce their hitbox a bit to compensate a bit). high key I wanna know what hitscan mercy pistol would be like 
Rez, i’d remove it and give her an E similar to Bapts. Really dislike rez and damage boost because of Ashe and Widow.
I would just make it a buff she can apply to a nearby ally, she blesses someone with a damage boost that last 5 seconds.
RMB change to:
Damage reduction on target 90%, plus
Damage done by target reduced by 90%.
Can target either teammates or enemies.
Negate Genji’s Dragonblade by reducing damage to a laughable 12 per slash (18 for nanoblade) 
God that would be terrible, imagine Bastion with a fire rate buff you wouldn’t even be able to peek him for 0.5s.
And every AoE damage guns would be frustrating to fight.
I would keep it, but put it on a meter similar to matrix. Balance it so she could have roughly 30% uptime is she was focused solely on that.
Put an instant charge of Rez on valk, and remove it from e so she has to burn her ult to reverse a pick, shave valk down to 10s and have it not drain damage boost meter during.
New utility on E. Preferably something akin to sleep, not necessarily a CC but something skillshotty that can make meaningful plays on a reasonable CD.
Seen it posted on a big buff mercy thread yonks ago, would give credit if I could remember who posted it originally hahaha;
Pacify:
Functions similar to a symmetra charged ball but does not deal damage. The enemy hit by it has a debuff applied that reduces their damage output by 30% for 4-5 seconds. Increases mercy’s skill ceiling, and adds a direct counter to nanoboost into the game. Would also increase her survivability against flankers too.
I wouldnt remove damage boost, but I would certainly remove resurrect. I’d replace it with something similar to what Kharazim from Heroes of the Storm has for one of his ultimates, specifically the one called Divine Palm.
Essentially its a preemptive resurrect where you place a buff on someone for a short while and if they take fatal damage (die basically) they are resurrected, but go into stasis for a bit (pretty much the same thing as when Mercy successfully resurrects someone and they have a 2.25 second window where they are invulnerable and not able to move).
It would require more precision and the buff would be placed instantly, making Mercy much more fluid and less clunky, as current resurrect I find to be antithetical to Mercy and unironically carries the same issues the old ultimate had in that it encourages Mercy to hide, forces her to stop healing and supporting her team, and halts her mobility and otherwise very fluid gameplay for a chance to make a comeback yet it ultimately often leads to Mercy dying before she finishes that cast, the person dying after being resurrected, or a mart team lets the Mercy get the rez, kills the Mercy and then kills that same person again, effectively baiting out a triple kill from something Mercy did.
Not to mention that its 30 second cooldown is longer than it takes to charge up most ultimates including her own as well as the average resurrects per game being around 6-7 which is also less than most ultimates (and that 6-7 doesnt include failed resurrects, only ones where you brought the person back, not ones where you died or that person died again shortly after which makes your situation WORSE than it was had she not rezzed).
There are so many other abilities even on support heroes that dont have all those restrictions and can have a huge impact and change the tide of battle in your favor more than resurrect can.
Antinade for example has so many use cases, negating healing, boosting healing, dealing damage, healing, as well as being instant and aoe and it can even be thrown (in which case it isnt instant, but its more versatility that resurrect doesnt have).
And most importantly in my eyes, its an ability that essentially requires failure on the part of multiple people to even be used in the first place and has no use and cannot be used at all without that prerequisite failure.
Its a big part of why in spite of what people think, Mercy (especially after Ana was released) was seldom used in high tier or tournament play despite being the only main healer in the game. It was because her ultimate was objectively worse than Zenyattas and Lucios and didnt serve any real use in good teams.
Its the reason they only ever buffed resurrect when it was an ultimate and never nerfed it as they wanted it to be better and maybe used more in higher tiers but she never was.
Then they apparently wanted to force her to be used and gave her a rework which made her mandatory as giving her single target resurrects on charges is objectively better than an aoe resurrect since you don’t have to worry about how may people are dead, whether they are within 15 meters of each other, or if they fall within the same 10 second respawn interval. You resurrected as they fell and possibly even the same person multiple times. SHe became mandatory if one team had her and the other didnt.
I think they knew full well how overpowered this was going to be but decided to go with it anyway since it was pretty sad that the games only main healer from launch was hardly ever used and she was very popular in lower ranks.
Alas, I digress, but going back to my original point, I would remove resurrect and replace it with something similar to Kharazim’s Divine Palm from Heroes of the Storm.
Hum can be alot of things. Like giving fast reloads, less ammo consumption, even damage ramp up. Say your DPS is hitting targets it would ramp up. Base damage could be like 5-10% more and ramp up from there
I dont know why but while I was reading your comment I thought of an Ultimate for a hero.
Freeze people but they can fire and look, but not move at all for a short duration lol…