I just saw this video
Close to the end he shows that Valve didnt nerf the armor pen on the A1, like they wanted to, since they overwritten the wrong files.
I imagined that to be the biggest nerf anyway, so right now, with the increased accuracy, the A1 isnt really worse but just different.
Allthough Im wondering why he states the A1 got a accuracy buff since I read that was nerfed too.
Probably we will see mostly A4s now with 1-2 A1s in Pro teams since ROF matters most against AKs.
A1 is only better on long range, which was kinda the intention to begin with I guess.