I feel like it was actually smart to have okabe move to a different group for now. She's grown past her bitchy phase from when we first met her thanks to the Maya arc, so now, she can grow a lot off screen without being attached to Minori. It's a good opportunity for her to grow.
That said, I'm not a fan of alice. She seems really one note and immature. Even though it's somewhat excusable w/ her being 14, I still am not a fan