3D seems to have done away with that from what I played in the demo. Play haphazardly got me killed, playing with skill got me through without a scratch (except for the boss but, even then I only took a small amount of damage).
It's a Osaka Team game, so of course it punishes players heavily for randomly mashing buttons. Re:CoM and BbS both require proper approach to battles to win. The early parts of BbS are basically unbeatable unless the player actually understands how the game systems work.
Reward was poor word choice on my part, but the benefits you get for playing well can be overshadowed by the ease of just mashing attack and cure in KH1 and especially 2, depending on your playstyle. When they removed things like the bonus XP for narrowly dodging and perfect blocks from KH1, it made brute force more attractive to blow through the game if you were only playing it for the sake of completion like most of the people I know.
Yeah, I agree that they're generally poor balanced between challenge and reward. KH2 in particular had such poorly designed QTEs that it became easier to just mash the QTE button (which never changes!) whenever you expect one to happen, rather than to actually pay attention to timing and skill. Good thing BbS changed this too.