Someone else said similar in here, but as I said to them: that wouldn’t really solve the problem. Someone’s probably going to play a long-rest class, and the game will still have to be centered on that cadence.
Though a game of no long rest classes does sound pretty good. Fighter, rogue, warlock… different warlock? Pinning everything to short rests I think would work much better for how people actually want to play.
That aside, there’s a whole universe of other ways to balance games than per-rest. DND mostly just has the one and frankly I don’t enjoy it.