I could see something like this working for more extreme content, and kinda hope they embrace that a little. At least, for the fights like Memoria Misera where it's not built to give you a preview of what it'll be like in Savage.
But as for the higher difficulties I don't see it happening. The devs like making very coreographed fights where people can plan strats, and you lose that if the fight is mainly about reacting to things as they come up.