There isn’t just one thing that makes D.Va so powerful.
The main point is how many things D.Va is good at.
Her AA hits in an AoE, so she has good wave clear from the start. She’s also good at taking camps, being able to take bruiser camps very early. Full Metal lvl 1 gives her good sustain. She can body block like a god, has a reliable escape, and self destruct gives her zone control. If you pick Micro missiles (and why wouldn’t you) she gets long range poke and a slow at lvl 10. Also, she can’t be beat on attrition because she doesn’t use mana.
RIght there, her strengths are more varied than most bruisers. Every other bruiser lacks a few or at least one of those things. D.Va is the only one who has them all.
The second point is D.Va’s kill secure.
Against almost all bruisers. If you want to run away and you’re at a range of 8.5 or more. They cannot kill you. You’re safe from entomb, Last rites, Sonya’s spear, Yrel’s jump, Imperius’ impale etc. The only thing that could kill you that far is maybe Thrall’s sundering, and it has to deal just enough damage. But it’s a 70 sec cool down heroic.
The first thing I noticed when I started playing D.Va is how many kills I was securing. Either I hit them with micro missiles , or I closed the gap with Q and finished them. And thanks to “Rush down” which is her default Lvl 4 pick. The target often just dies on impact. And if I hit them with missiles, almost anyone on my team can finish them due to the slow.
I think Micro missiles is the most likely thing to be adjusted. For a bruiser, long range damage and slow on short cooldown is a wet dream. Even when you’re not targeting a hero, the damage itself is pretty good. It does decent damage to forts and towers, which it conveniently outranges. I don’t see them removing the slow, but then the damage should be reduced. As much as I like playing D.Va and am getting tons of value of that ability. We really shouldn’t get both that damage and the slow. No matter which other bruiser I play, I don’t get to kill secure even close to that.
Third, “Boosters” become way too good, way too fast.
By Lvl 7. Hitting Q gets you out of trouble, deals 2% damage to the targets, heals you for the damage dealt, deals extra damage to all non-hero targets, and it even stuns.
Now, I know what y’all gonna tell me. “But phase, it’s only a 0.5 sec stun”
It doesn’t matter. It means you can interrupt almost anything under the sun!
-Azmodan Lazer? Sorry pal, not this time. Even if I’m not the target I can still deny it.
-Anduin Holy Word? Sorry my king, I’m afraid your men will die.
-Nazeebo channeling ravenous spirit? Denied!
I get to cancel heroics with an ability I have every 10 seconds. The only drawback is that I deal 2% damage to everyone I hit and heal for that damage. Most heroes need to hit skill shots for that. Or put themselves at risk.
Last game I even caught and killed Samuro 4 times with Boosters! (Ok, killing Samuro feels so good that I can’t really complain about it. So maybe nerf it while still having it kill Samuro.)
And finally, I get a brand new health bar every time I reset my mech. This allows you to get away with so many things.
-Leoric is weak early game and sucks at taking camps. I don’t suck early game, and I can take them early.
-Malthael can can take the camp, but will lose a bunch of health and most of his mana and will have to hearth. (plus because his trait doesn’t scale, it takes him about as long to take camps late game as it does early). I don’t use mana so I don’t care
-Imperius is bad at both clearing waves and taking camps.
-Sonya is close but she can’t do half of what I do. And it takes 16 levels until she gets a panic button for when he’s low health.
-Dehaka, lol
You get the picture. D.Va just does too many things too well and, (factually) gets away with murder. I like winning, but she needs to be balanced.
(Oh also, why the hell does D.Va have a slow on “Big Shot” ? she does not need that)