Not point upgrading affection on girls unless they are the 3 on your team. With the new rules there is a point to leveling all of them especially is there is a contest that rewards it.
It would be nice to reach 3 or 5 stars but it isn't as if you can't see the pictures on the wiki.
With the move away from using points in the arena where affection items drop pretty often leveling up affection has become a huge pile of suck.
Also being pushed to fight bosses, well I want to avoid getting girl at least until I get the 1 boss girl per level as I figure those will go to 5 star quicker and I don't want the costs to spiral completely out of control. So much for that idea unless I stick with the lowest one [I got all his girls] and even then with events he will drop, or go PvP which gets me nothing as I understand it.