I'd give up a champion release for AA's not hitting after release being fixed.
I'm sure we've all seen it. You cancel the animation with the attack in the air, and it cancels the projectile, or even the damage, even if it's left the champ, or sometimes connected with the target. This has been a problem for a long time, and will require a ton of work to fix. However, I think it can be fixed in a pretty short amount of time if you just bust it out and put all forces into figuring out the issues and fixing them.