I do feel that slowly, edition by edition, D&D is moving closer to it's recourse management being tied to it's round based action economy which I actually enjoy.

As a player, it's already pretty easy to play this way, before counting subclasses, the rogue has literally no abilities that are limited by anything but once per turn, and if you pick some fun narrative spells as warlock and rely on invocations and eldritch blast, you can be totally effective without any resource management. Both of these exclude hitpoints of course but that is a pretty reasonable resource for a combat focussed fantasy game.