As much as I enjoyed flow motion as a dynamic mechanic in Kingdom Hearts 3D, I still have to give it to BBS from a gameplay standpoint. You have access to all the various types of flow motion attacks from the beginning of the game. It might have been more interesting if, as you progressed through the game, you learned new ways to interact with the environment. Beyond that, though, I loved that Birth by Sleep encouraged you to use a blend of magic and melee attacks to influence difference combo forms. I was disappointed when 3D only offered forms through your dream eaters. I really hope that KH3 combines flow motion with Birth by Sleep's combat system, because holy hell that would be awesome.