A 5e crpg would be incredibly hard to balance at high levels. It's well known that the 5e CR system breaks down at levels greater than ~10 (or even 7 imo). Casters get incredibly powerful spells that can decimate groups of enemies and instantly end combats. Additionally, saving throw bonuses don't scale well with level. E.g., a fighter's Int and Wis saves will be +0 to +2 at levels 12+ against enemy spellcaster DCs of 18-22, meaning they'll almost always fail. This turns high level 5e into an extreme game of rocket tag.
Sad Pathfinder 2nd edition launched later, when game development was already in progress. Would be so much better basis for game. Not mentioning action-points-based mechanics, which which Larian much more familiar.
