As long as the CPU doesn't go all Madden 94 on the SNES I think it will be fine. And what I mean by that is I remember coming out in a fake punt and everytime the cpu would come out and immediately audible to a base defense because they knew. Anything to make the CPU tougher and smarter I'm all for.
One thing I'd like to see with all the protect the sidelines stuff is a concerted effort by the CPU to get out of bounds and run plays that are designed to get out bounds when the situation calls for it. I don't expect that to be the case but at least running plays designed towards the sideline should be easily doable.