well, i say they all could use a sprucing up. with the technology we have today, i'd say Disney should take a little time-out on trying to make 'new and better' animatronics and update the ones they have. i think that would make a world of difference with some attractions!
one attraction that i've found needs a bit of a rehab that wasn't mentioned was, believe it or not, Haunted Mansion. yes, our beloved Mansion could use a little work. now i haven't noticed much...the thing that bugs me the most is the graveyard scene...if you pay attention to the screen (or whatever that is) between you and the 'ghosts', you'll notice how dirty it is...the thing, to my knowledge, is supposed to give you the illusion that you're there with the 'ghosts', but instead the obvious screen makes it apparent that you're seperated. i dunno, maybe i'm just being nit-picky. and i really wish they would update the staircase a bit...the giant spiders just seem so cliche and unrealistic.