I'm actually decently hopeful for Episode 7 with Michael Arndt writing.
Things like writing out Bo Peep (and quite a few other toys) could have been disastrous in Toy Story 3, but it was handled with so much class. The story was boiled down to its essentials, leaving the bare minimum to carry it forward in a natural progression. THIS is what we needed with the PT, which could have done just fine without excessive amounts (or even the inclusion) of Yoda, the droids, Chewbacca, Anakin in Vader Costume, Jango and Boba Fett, Jabba, ET, a (deleted) Greedo scene, and anyone else ought not have been there.