There seems to be way too many fumbled punts.

In my last game, I fumbled away 3 punts with a player rated 81 kick catching and 83/100 Avoid Fumble. Seems a bit too much.

That might need a slight adjustment.

I've been seeing quite a few botched punt returns as well, in addition to an increase in KR TDs. Also on the subject of STs, there seems to me to be way too many false start penalties on punts.

My guess for this would be that you have backups on your ST unit who have a low Discipline rating.

This isn't a gripe specific to me, actually. I've noticed lots of opponents false starting as well.