Pointless poll by how its asked
Personally I won't use it... but I'm also someone who actually appreciates consistency in NPCs. To me their race, gender, background, starting class, sexuality, character, morals,... are something that should be defined to have a fully developed character when you meet them. Like everybody they can then take a different path and be influenced to some extent as people do based on experience and companions.
...at the same time its a game and people want everything to bend to their vision because the best stories always have to pander shamelessly to their audience, right? Right!...
Honestly, its such a small thing in this case. Basically just removing the need for a mod for those who want to test something out. I'm also one of those DMs/players that sees classes as a set of mechanics that can be flavored as you want as long as it follows the rules. The whole reason for their existence is to have balanced options, but if you want to play a preacher on my table that has no divine spells, its no issue. If you want to follow a fiendish patron, but not use the warlock class mechanics - what's the problem? You won't be casting eldritch blasts, but can still be talking to your devil/demon. D&D 5e rules don't even really have a set solution if you ignore your patron as warlock or lose your belief in your deity as cleric just suggestions for the DM.
If in BG3 players break the backstory of the origin companions by changing the class and the whole narrative becomes wonky and feels off - congratulations! You did it to yourself!
