?
Because the charts DO track spell levels, its right there in the character creation when you select your class.
The problem is Larian isnt communicating that information. Its (again) not the fault of 5e, but Larian.
Pretty much. Larian historically struggles at designing their UI for whatever reason.
One of the most common complaints about BG3 is just how bad the UI is at conveying information to the player, and it's only gotten even more harsh since Solasta is a thing. Their UI is actually extremely easy to understand and use, even if the actual look of it doesn't really fit the game.
Functionality should always be prioritized higher than flash. That said, I wonder if BG3's UI can even be improved by that much, because the engine in use seems like it might not even support it (and several other things observed to be missing from the combat system). Larian seemingly continuing to prioritize cutscenes and whatnot seems to suggest something like this, because the longer they keep putting off a UI overhaul, it's only going to get harder to do so later.
It was, quite frankly, a very poor decision to base so much of BG3's programming off of the D:OS2 engine, for a game that is supposed to be AAA high budget. A game like this deserved an entirely new engine that is actually able to implement everything that needs to be done, not something cobbled together from a game in a different series.