What do people think about 5e as a whole?
Solasta and Baldur's Gate 3 would both be much better games without suffering from the restrictions of "D&D 5th edition" --- especially Solasta, which did not actually have a license to use D&D but pointlessly imposed the rules on themselves anyway.
The single worst aspect is the limitation to 4 party members, given the inherent value to turn-based, tactical combat in having a larger number of characters for more class variety and tactical options.
"D&D 5th edition" attempts to compensate for the small number of party members by turning from heroic fantasy into the superhero genre, where all characters, regardless of class, quickly accrue various zany abilities, which however are arbitrarily limited to one use per battle, short rest, or long rest.
There is the idiocy of the "short rest" mechanic, in which characters inexplicably recover half their hit points and certain abilities, by taking a quick break, which for some reason can only be performed twice in between a "long rest".
The concentration mechanic means that a large portion of spells (and non-spell abilities) are exclusive to each other, in that a caster can only have one spell/ability requiring concentration active at one time. This inevitably results in nearly all concentration spells/abilities being disregarded in favor of one or two that are most powerful for a given class and level.
Characters are nonsensically allowed to level up in any class, meaning a character can suddenly gain all sorts of abilities associated with another class by taking one level in it, which permits all sorts of overpowered, game-breaking combinations.
Both Solasta and BG3 would have been far superior if they had simply relied on a home-brewed combination of the six TSR editions of D&D/AD&D.