I guess I'll start my late wish list right now so here goes...
-More development for the doctors, as individuals and as partners or possibly something more.
-I guess to tackle on some hard issues and wishes like wishing for certain someone's to never exist due to negative feelings like being Shallow, Revengeful, or Depressed and see how the doctors will progress through it.
-I don't really want the activists to do anything terrible to interfere with the player or hinder them. Mainly because I love the gray area that the mini DLC's had existing. Sure the game sways you into the professors side but it seemed like it didn't force you to see them as bad guys because they are just doing what they're believing is right. Just like the doctors.
-Alistar and whoever their boss is. Basically background info about the company. Maybe even the requirements for the job and benefits(Free Wish etc.)
-Maybe make the puzzles more interesting because the one in TTM was nice but it felt sluggish to me.
-Some diversity in patients like gender, race, or even youth surprisingly.
Aaaaaand that's all I can think about but these were some stuff I have on my wish list.