There definitely are serious balance issues that need to be addressed. But many of us are arguing that the problem isn't 5e rules, it's the combo of 5e rules + homebrew decisions that Larian has added. Many of these changes remove much of the tactical decision making from 5e combat, removing synergy from the different classes and turning combat into more of a 'hack and slash'. However, such hack and slash games need to have higher chances to hit to be fun (feel like a superhero) and make up for the loss of tactical thinking. Larian should fully commit to one side or the other.
Like I said I was just repeating what I'd been told in a number of other threads. What I think Larian need to focus on is not making a D&D game, but making a
fun game that's in the D&D setting. A lot of players will buy this on the back of DOS2 which is arguably (is imo) the finest RPG ever made and are going to be sorely disappointed. If the combat in this game was on par with the combat in DOS2 we'd have a masterpiece on our hands. Sadly it's not even close.
BG3 combats seem to be balanced around taking a long rest every ~2 fights. Long rest frequently and you'll be able to use your powerful spells more often. At level 3, Wizards have 4 first-level spell slots and 2 second-level spell slots. That's 6 leveled-spells split between 2 combats, which is a fair amount considering that combats last ~4-10 rounds, and this only gets better with higher levels and more spell slots. Warlocks get less spell slots but these do recharge on short rest.
It's not that I don't understand that, it's that I don't agree with that decision. Look, we have a perfect storm right now of a lack of spells, a limit of how often spells can be used, and a high miss percentage. For example, it's a good idea that frost ray (or whatever it's called) does less damage than Fire in exchange for slowing the character but if you miss and then can't cast it again in the fight it's neither use nor ornament. At least a fighter who misses can always swing an axe again. At level 4 you get a cantip or ability or something that allows for the spells to be replenished, but then Larian made it so it can only be used out of combat and only regenerates
one Rank 2 spell. Larain has made combat magic worthless which means Gale is worthless and most players will never play a wizard. The mechanics surrounding how magic works in this game needs a major rethink before this game is released. They simply aren't fit for purpose in their current guise.
