I think that most issues with the gameplay has already been adressed, but nevertheless here my "additions":
1) Dispite the situation Obsidian has put themselves in, i do hope they justify it by having a story at the same caliber as KotOR 1.
2) Have Yuthura Ban as a party member.
3) More variations on the faces of NPCs.
4) No underwater missions!
5) Let each world have bigger and longer levels, but not bigger for the sake of it. I don't feel like running trough a canyon only to find nothing on the other side.
6) Let the follow characters have cameo appearances: Canderous, Carth(if female), Bastila(if male), HK-47 and Mission. Jolee and Juhani can have their fates revealed as a story, no need for cameo there.