I've been a BIG fan of turning off this stuff for quite some time. The funny thing, I actually pitch better with it off (though with the propensity to occasionally overcompensate like you mentioned). That rumble is just utterly obnoxious and really caused me to throw WAY too many strikes.
The other tidbit here....pitch out of broadcast cam. As you go on the road and that camera angle, you have a little adjustment period pitching in a different ballpark.