said: Bolin is getting his own story arc, and for his entire life he's been in Mako's shadow. He can't have a good character arc with Mako by his side. If they're apart for the first time in their lives, they'll both grow in a way better and more interesting than if they were together.
Oh yer definitely! If Bolin is apart from Mako it forces the writers to give him more screentime as well, instead of just having him in the background making semi-funny jokes all the time.