Considering how Power Attack is the end all/be all feat for melee combat... I'd say yes. It's not a big deal either way, but due to the fact that ACs are relatively low compared to attack bonuses, actually hitting is less important than the damage you do when you hit.
Basically, you made a game where power attack is a necessity for DPS builds, so obviously the -x to hit is not big enough to warrant staying away from a toggle.
I'd love it to stay on after death as well, but that's just me.