Guys, i can announce that the drop system is not a pain in the ass, it's kinda fun actually, if you want to return to playing with sora/riku, then when you drop you can automatically drop back by going to the pause menu. The only pain in the ass of the drop system is definetly dropping while in a boss battle, that's kind of annoying. 
  
(before asking questions how i know, the game got released early in my country