1.) Stitch's [not-so] Great Escape --- If you've experienced the attraction, you'll most likely agree.
2.) The Imagination pavillion --- In my opinion, this pavillion (as a whole) needs more help than any of the others at Epcot the moment. The film has grown pretty out-dated, and the ride... well... the fact that it is walk-on all day pretty much any day of the year speaks for itself.
3.) Rafiki's Planet Watch (Conservation Station and all) --- In such a gorgeous park, with so much beauty, such authenticity, and immaculate themeing... to have a barely themed train-ride through all these backstage areas seems so wrong to me. I appreciate that Disney tried to promote a conservation message by showing guests "this is how we take care of our animals" but I honestly just don't feel this area fits in with the rest of the park and that the conservation message could have been presented in a better way. I think they could keep the actual Conservation Station building if they wanted to, and use it for educational field trips or as part of one of the seperately priced "behind the scenes tours" Disney offers.