i think we need to narrow our definition of "park" because for some, park means just jibbing but for others, park means hitting big kickers. lizzies aren't too great for big kickers because of their softness and sidecut, but they are tits for slow speed jibbing. that said, you don't need a long ski for slow jibbing, so the bacon would be a waste if that's mostly what you qualify park as. if you hit more big kickers, they would be better than lizzies, but the amount of sidecut is going to make hitting/landing jumps harder.
lizzies hate going straight, and i haven't skied bacons but i'd imagine they aren't much different.