Please stick with what monsters should be able to do by the PHB / Monster Manual. Don't give basic goblins any potions, scrolls, superpunches or anything that simply isn't there nor should be there.
(Also don't give them "levels". Monsters don't have character levels, only Challenge Ratings.)
This kind of thing was unpredictable and endlessly chaotic in DOS2 and many players found it hilarious, me included!
But BG3 is supposed to be a DnD game. Or make "homebrew wild mode" an option if you must, but it appears a lot of players want an as authentic as possible 5E experience here, and I agree with them.
