Multi-battle was changed and is working as intended, though based on player feedback it may be changed again

what happens now is:

Dragon Claws said:

Only the leader slot at max level will stay, if anyone is placed in the non leader slot at max level they will be taken out in attempt to replace it with someone to level up.

I get that this is the "standard line" you're going with and thus you probably won't acknowledge the illogical nature of it, but I'm going to point it out anyway.  

THIS MAKES NO SENSE WHATSOEVER!  The entire point of doing multi-battles is that the player does not have to actively watch and interact with the game.  Hence, when doing multi battles, the player is FORCED to use auto-battle, further encouraging the player to set the phone aside and not actively watch.  Automatically removing a max leveled character does absolutely nothing to "attempt to replace it with someone to level up", because the game does not inform the player that this is happening.  Unless you ask the player to confirm whether they want to continue multi battling even though this character will be removed, this is a completely useless feature to achieve that stated goal.