This would be awful. You’d never be able to kill him 1 vs 1… and you’ll need targeted CC to have a chance to get him (like diablo Q into a wall, or kel ult).
Does she need to have her skill floor lowered? It’s not quite the buff in a true sense.
Could make it into a sort of minigame, where she has to snipe each enemy once without dying and then she no longer loses the stacks.
Then, she could just get a “every snipe increases the damage of the next one by 0,5%” sort of thing, since it’s an easy to hit spell. She could lose this bonus on death, making her not an autowin.
I think it just feels bad to only be able to snipe when you’re sure it will hit, this was the part of the nova rework i hated the most.
If it did a ton of damage when you have it stacked I wouldn’t mind as much, but it’s balanced more like punishing you for missing than rewarding you for chaining Qs
Can you put the reason behind your proposed changes?
If this is meant to be more useful in teamfights or the solo. Most of her damage comes from her W. It’s pretty rare that you get to get a lot of AA’s in during team fights.
Probius is already pretty hard to catch, especially for melee characters. How would we deal with him after that change?
That should probably be a talent. Artanis is good at the 1 v 1. I don’t think he should also get waveclear as well.
No. Not balanced
Probius is notoriously squishy, he zones out non-tank melee heroes but that’s kind of necessary for him to not instantly die in every fight. If hammer can have the escape she has I think its fair for probius to be uninterruptable by damage too
His waveclear being so bad is kind of the reason artanis isn’t very viable. The other laner has got 2 waves by the time artanis is done clearing one. His 1v1 strength doesn’t matter if you can just refuse to fight him.
More AA damage is just a way to make sonya a little bit stronger all around. She’s not bad, but she’s fallen off a bit with the powercreep over the years and a small nudge is probably good
I don’t think nova’s damage is even particularly good compared to somebody like hanzo even at full stacks. She still has the core weakness of waveclear and squishy + no mobility
Being squishy is no longer an issue if you can move with a 60% speed buff. Hammer doesn’t have a baseline 10% move speed bonus. If Probius had to stand still to use its abilities. I’d be fine with his Z being uninterruptable. Same if hammer could move around at normal speed while in siege mode. Her Z could be interruptable.
Thrall is doing pretty well, and his waveclear isn’t amazing. He’s not a bruiser you pick to double soak. Like Chen or Rexxar or Imperius. If you know you’re playing against a solo who double soaks, you bully them in lane to zone them out of XP, and when they leave to clear another lane you wreck their structures with “Amateur Opponent”. If you pick “Protector of Aiur” against a double soaker, you deserve what you get.
Bruisers usually get 2 out of three of these to be great at. Wave clear, sustain , 1V1.
I don’t think a slight buff to AA would make a difference honestly. She would either need better CC. Or whirlwind to deal more damage to mercs, and heal a bit more. You lose your sustain if E is interrupted, and if you’re hitting multiple targets in a teamfight, you always take much more damage than you heal for. Which would be ok if the ability didn’t require you to be in the middle of your enemies. But it does. Her CC is a very short stun on a skillshot that can be body blocked (The stun is so short the tooltip doesn’t even give a duration) and her only reliable escape is to burn her ult.
These are the issues I think need to be adressed to help her. I’m 100% sure more AA damage wouldn’t do anything.
Here’s the main problem. They are never going to make a cloaked hero as good as it should be. (See Valeera) People dislike them too much.
Also, if you want mobility, then you’ll have to give up clone, because I don’t think there’s any way they’ll let her ever have mobility, clones and cloaking. (We don’t want a ranged Samuro with a baseline slow)
What this achieves is forcing Sylvanas to stack even more. This is the definition of “bandaid” fix. You are only making the problem worse.
Why?
Why?
Why?
This would make it impossible for anyone to ever catch Probius. Sure, Hammer can do that too, but she has one of the biggest hitboxes in the game.
Artanis already has the insane 150% damage bonus from [Amateur Opponent]. Giving him even more PVE damage is dangerous.
Listen, I know that Nova is almost useless, but increasing her Q damage by 55% is not the way to go.
What would she do against Abathur?
Have you not learned anything from Mythic Quests?
Zeratul is one of the strongest characters in the game.
That they either give them too strong or too weak rewards? Well, then, I might join the side of those saying they shouldn’t change anything anymore… if they only do coinflips.
Sylv mythic is really OP and it’s completed in too many games for how powerful it is. She can stack by teamfighting OR splitpushing anyways so this slows it down and makes her less likely to get it completed in as many games.
gust is like one of the strongest tools in the game, often instantly winning teamfights. Falstad already has a strong enough kit, a cooldown increase has been a long time coming on gust.
I’m not really sure about most of your suggestions, but would agree Sonya is definitely in need of some reworks to her kit. Hopefully she gets a look soon.
I believe she is the lowest WR hero in ARAM currently. She is a bit more usefull in QM and SL, but still well in the bottom half of WR.
I too don’t like the snipe master quest. However, it can’t be removed altogether without being replaced with some new mechanic that doesn’t lower her skill floor.
I always want Nova to feel like a sniper by giving her an ability to hit her target at the very tip of her Q line of fire, it’ll hit without blocked by any obstacle along its path but if it’s off the area of the tip of her Q, then it fires as normally and can be blocked as it is now. 
So maybe similar to the Li-Ming talent that makes her orb do extra damage if at the end of it’s range.
A little nod to the old games like Serious Sam where no scope does normal damage, but zoomed in with the scope does X2 damage.