I wanna say the linked attacks with the spirits could be a replacement for shotlocks. I missed shotlocks, mainly because it made you invincible for a short amount of time, enough to gather your thoughts on what to do next during a fight. Sora had something similar when he used the dream eater link, he'd be invincible for the duration of the link, while riku just sorta transforms his keyblade into something or gains wings, he can still be hit and take damage though.
It seems like you're invincible during flowmotion in this game, too. You can just dash into a wall and beat stuff without taking damage - at least that's what I've been doing so far.