Before we talk about Nerfs/Buffs, it should still be pointed out that the aim assist still needs to be fixed/tuned down. There are times when I don't see the enemy on my screen and my crosshair moves by itself (this happens most often in nepal: sanctum when enemies are on/getting to the point and i'm near the wall by the big health pack).
Also, if there is a Zenyatta who steps close to my crosshair and has transcendence on, my crosshair sticks to him as well (even if I was aiming at someone else).
TL

R, aim assist still needs work on console. It works better than day 1 patch.. but still has some to go.
At some point, once I have a PC that can run OW properly (my PC is 5 years old... last time i tried to play OW I kept getting kicked for inactivity because I couldn't load the game properly). I'll have video comparisons on every version of OW, and how the different versions of OW affect my aim.
I've tried various control scheme setups, re-adjusting to these various control setups has definitely affected my play style and ranking. As well as shifting to different sensitivities and aim assist variances.
I've used:
PS4 Stock controller
PS4 Scuf controller (no triggers stops, but does have electromagnetic mapping)
Mouse keyboard (PC)
Mouse/keyboard (PS4 - via XIM4, one of my friends has a titan one I might be able to borrow for later testing)
XOne (not mine, friends)
Once season 3 rolls along, I hope to answer the biggest questions. 1.) Which controller is the best on console? 2.) Is mouse and keyboard on PS4 OW really cheating? 3.) Can console players go against PC players (given there is aim assist)?