Hi, here are the right nerf and buff that Blizzard should do:
Nerf: Dommfist is too strong, you should increase the colldown of his skills, and you do not have to give him the armor when he does the damage.
Nerf Mei: decrease the damage of the icicles, and the rate of fire, mei is not a sniper
Buff: return the ulty of Tracer to the 400 points of damage, increase the radius of the explosion of about 1 meter ulty
And adjust the various hitboxes of the heroes.
These in my opinion are the various flaws that the Blizzard should fix as soon as possible, I’m curious also diseval your options
p.s.