It's sort of incredible how people treat 5e as a religious text, as if it couldn't itself be the source of poor balance.
Case in point, the atrocity that is the Concentration mechanic. In what world is being forced into a Bless Bot (say good bye to using channel divinity spells, since they can't be used without cancelling Bless; and if you cancel Bless, have fun missing 1/3 of your spells) or having 95% of your druid spells be mutually exclusive because of concentration-- or that flame blade, a spell requiring one to be in melee range of multiple mobs, require concentration to maintain-- a remotely good and balanced design?
Some of you people are even arguing in favor of limiting rests. It's incredible how set you are on making a garbage videogame just so you can do a 3D rendering of a tabletop game which works with a group of friends and DM but is completely untenable as a single player RPG experience.
There's a pretty massive gulf between Larian looking at the 5th edition rules, finding an imbalance (lol) and changing a class or feature in BG3, and Larian making height advantage the most important aspect of combat for all classes, making scroll-casting universal, and filling the world with exploding barrels of napalm that are more effective than actual class skills.
Not really, because the massive gulf is in 95% of spells being useless out of the gate due to Concentration (you will just find the most "valuable" concentration spells to maintain and ignore all others regardless of circumstances, because spell slots are precious and limited, and using a utility spell for a spell slot that could go to applying damage carries a humongous opportunity cost) and severely weakening the viability and utility of casters compared to melee.
You state height advantage being the most important thing in the game, but this is not even true, because the biggest advantage is not bringing in any casters altogether because casters are terrible compared to martial classes, who have far more base AC, have higher base health, enough movement to make melee restrictions irrelevant, and their ranged weaponry even rivals spell casting without using up a spell slot. Why am I ever encouraged to use casters if their hit chances at ground level are abysmal, spell slot using spells have hit chances for some absurd reason (and this is not a Larianism, it's pure DnD garbage, limited resource using spells should be guaranteed hits or not use up the spell slot if they fail to land).
More importantly, you're discouraged from using casters because the 5e racial imbalance is horrendous, you have 2 useless human casters without darkvision (unless you spec Wyll into the warlock perk for it) completely screwed in accuracy in the Underdark, who are plenty vulnerable to sleep unlike elfs who have OP racials per 5e that give them sleep immunity and charm resistance, and thanks to the awful Concentration mechanic, Dancing Lights cantrip cannot be used to shore up this weakness in racial imbalance to make the human casters serviceable in the Underdark or any dark dungeon settings.
Who needs barrels of napalm risking collateral damage or any convoluted tactics when you can grab your martial class, trivially sneak for a backstab attack that can kill lv5 bosses in 2 action turns, which you get automatically from the surprise mechanic. Martial classes completely dwarf the competition, and you people say it's fine because in 5e casters get better at later levels.
This is abysmal videogame design because you make playing a caster miserable through 1/3 of the game, and then make martial classes feel suboptimal on another 1/3 of the game. Why not make them consistently powerful for an enhjoyable gameplay experience throughout the entire game? Only out of feverish devotion to some tabletop rules as if it were some sacred text and not just a collection of design decisions that deserve just as much criticism and change if necessary.
