For my spell casters to be useful I'm going to the camp after every fight. It's a lot of clicking and scenery changing seemingly for no reason. Why can't you just automatically restore all spell slots after an encounter ends?
Ah! The eternal issue of per-rest casting. cRPG love those, yet they don't have a structure that would support such design. I would be shocked if Larian didn't have some idea on how to tacle that problem - if not for EA, then for 1.0.
Generally the problem is, that if resting is unlimited then it throws off the balance - either you tune it hard enough so players have to rest after every encounter (in which case rest might not exist) or you design content so the ability use is spread through multiple encounters - in which case the player can break the balance by going all in and resting more often then devs wanted them to. My personal issue always has been not using abilities or items - I am a horder, so knowing that I should preserve spells and abilities, meant I barely used them.
Probably my favourite implimentation of this system was Pillars of Eternity1 - resting required supplies and you could only carry two at the time. That allowed devs to pace dungeons - they knew how much rest you needed and could design around it - as well and provide additional supplies in dungeong to gather if more rests were needed. Granted it was a soft lock - nothing stopped players from leaving the dungeon and going to town to buy more supploes, but I felt it was enough to pace rests reasonably.
Kingmaker had a rougher approach - it also required supplies (per party member, rather then per-rest) but amount was up-to-the-player. Limited only by carry weight. Less succesful approach IMO, as in general you don't want to carry more then one rest as for the most part you won't need those (you can hunt when resting outside). However, on couple occasion stocking on supplies is necessary, yet the player won't know that until they beat the dungeon and follow a guide (which, by the way, I think is the only reasonable way of playing Kingmaker). A more convoluted, granual and tedious system then PoE, but I think it does a poorer job in pacing rests. Kingmaker has also a time management aspect, but I found it to be mostly smoke and mirrors.