That is why I preferred the PoE system, and I think Dragon Age did it too, where most skills are per encounter and only a few per rest. So you do not have certain power spikes, combat is easier to balance and more consistent and a mage with no spells left or at a low level is just ballast. Or cooldowns would work as well on skills I guess.
It kind of makes sense if you think magic is indeed something that should be indefinitely more powerful than physical prowess or expertise, though.
I dunno for 5th edition, in 2nd and in previous baldurs gate game, at highter level, mage is the most broken class ever, by far. what you suggest would make them even more broken. '' oh, lets cast a fireball and summon a planetar each fight ! Oh, lets cast 9 magic missile on this mob, I'll get it back after the fight anyways. Oh, lets use my chain of contengency right away with stoneskin, spell invul , mirror image and magic weapon immunity, cuz i'll get it back anyways. Oh , lets use time stop every fight and solo win, because I'll get it back anyways''.
See where i'm going?
