Hi! GM Mercy main here, been playing the hero since launch, have almost 800 hours on her, yadda yadda who cares.
She is so much more than a damage boost bot, to call her that is to utterly disregard all of the value and impact her kit has to offer.
First off, calling her heals bad is just wrong. Her healing has unique properties which no other main healer does (no reload, no aiming, very loose LoS restrictions, and healing through shields) which alone makes her way more valuable as a healer in certain situations, such as if you are playing against Dive heroes like Winston. No other healer can pocket their squishies or second support better than Mercy can.
Rez is not at all too risky to use. The cast time is very easy to work around, you just need to use your knowledge of the game, teamfights, and the terrain to look for a window which you can safely rez in. You have ten entire seconds to press E on a soul, that’s a lot of time for a safe oppurutnity to present itself. Use her spacebar passive, use cover, use shields and LoS, ask for heals/bubbles/etc. And in many cases, valuable teammates like Widowmaker will die in super easy to rez places on highground.
You are also underselling her mobility. Supports are the most valuable parts of a team comp, when they die the team falls apart. Mercy has the best mobility and survivability of all supports, and thus she dies less than the others. She is alive more, and so has more uptime and value being output over the course of a match than say, an Ana who spends all game fighting off flankers and dying. Not only does her mobility allow her to stay alive, she can bait out enemy abilities and ammo and thus waste their resources and time, taking pressure off of her team is the process, as well as reach her teammates in situations where vertical mobility in required, which is hard for the other healers.
I always laugh when someone claims Valkyrie “doesn’t have anything impactful whatsoever” LOL. It’s probably one of the most versatile and useful support ults in the game. First, you have to keep in mind that it essentially makes her unkillable for 15 seconds. That’s 15 seconds of guaranteed healing/boosting output to your team. Then, it multiples her potential healing output by so much. Normally, Mercy can heal 750 health in a 15 second timeframe. During her Ult, Mercy can heal a potential of 4,500 healing in 15 seconds. That’s an INSANE boost to her healing potential, and the fact that her beams become AoE in this also drastically improve her life-saving potential. When you use Valkyrie, you are basically summoning 4 other Mercy players onto your team for 15 seconds, with all five of you each pocketing someone on your team with 60 HPS or 30% damage boost. How is gaining 4 more Mercys for 15 seconds “not impactful”. That’s not even taking to account how strong chain damage boost is for securing kills and bolstering your team’s ult economy.
Sounds like a /you/ problem and not a Mercy problem.
She is, and she has been since launch. She is currently a main healer, and functions very well as one, statistically and in practice.
You are.
Mercy is quite literally getting a mega BUFF due to 2-2-2 Role Queue coming. She is the best 2-2-2 healer, as she works much better with a majority of the DPS roster than Ana or Moira do, and Mercy is extremely flexible for all situations, maps, and team comps, whereas Ana and Moira are best relegated to more specific, slower, tankier comps. Ana also suffers against Dive, which will return, whereas Mercy THRIVES with and against dive. The sheer fact that you will have 2 DPS every game means Mercy is getting a buff to her viability, and she was already good on live.