This is one of my biggest problems with the current vesion of the game. I wrote about this
there, and several other threads. So, I can't help but +1 this.
I'd like to play through night as well as day, but if Larian invokes a "sorry, animation/light is too costly", I could be ok. Adventurers adventure during the day, and sleep at night. Or at least rest until the next morning every time they do a long rest.
Wouldn't it be nice, as far as the journal and story are concerned, to know that we're in the 5th day since the crash ?
The fact that time is so not accounted for in any mechanism (well, barely any, there are a few), but the story heavily relies on it, is such a big dissonance.
The way longer spells work is fine, imo. Mage Armour lasts until the next long rest and consumes a spell slot, which is a replenish-at-long-rest resource. Also, it's pretty much how the DnD 5E (tabletop) version of the spell works.
As for short rest, they are a joke in BG3. We now have 2 instead of 1 per long rest, woohoo ! Except that they are completely irrelevant without a restriction on long rests. Also, the way short rests work, you can take a short rest on your turn in turn-based mode : 1h lasts less than 6s !
I'm rather fine with the simplified HP-recovery system. This is one of the rare parts of 5E that feels convoluted (in an otherwise super-streamlined DnD), I'm happy to just regain the replenish-at-short-rest resources and a bit of HP (except that Larian has given a us a huge bit of HP).
Likewise, I'm happy to assume that if I change my memorised spells (only possible out of combat), it is implied that my party took a 1h break for this to happen.
I don't think it's a matter of big/small company. I think (hope) that Larian has just not properly worked on time and the resting mechanisms yet.
I think it's more a matter of design philosophy.
Given that resting and resource management is such a big part of DnD, it's baffling that they have given us access to a version of the game that doesn't have this mechanism sorted out yet. As if they considered that the fun of the game (5E or BG3) was all about being able to do crazy combos during one turn, or one round, or one fight, but that resource management was boring. And thus it made sense to let us play with the one-fight game, right now. I'm not saying it has no value for debugging purposes, but all the player data that they are collected (when we save, load, rest, etc) are certainly heavily influenced by the fact that resting is a joke.
Anyway, I'm hopeful they'll get round to sorting this out. And I'm in no hurry. So long as it's there and good at the end, it's fine.