As much as I'd like it to be otherwise, two-weapon fighting / dual wielding (TWF) hasn't really been intended as a universally accessible fighting style in D&D 5e. Only Fighters and Rangers get access to the style normally, which lets you use the stat to damage. Rogues also use it to get more chances to sneak attacks. Very few others could use it effectively, even if they didn't have to spend a bonus action.
That being said, for BG3, if you want to dual wield, there might be hope yet. Larian have said at some point that they plan on including multiclassing, so unless that has changed, playing a Fighter 5 or Ranger 5 that then levels Rogue should give you pretty decent damage and a lot of skill utillity. Add in that the Thief subclass for Rogue gets another bonus action and there are bonus action maipulation on items, dual wielding has the potential to get out of hand if we can multiclass.
Edit: By having having dual wielding be a bonus action, Larian might've ended up buffing it in the grand scheme of things. We've got a helmet that gives +1 BA when you're below 50% hp in EA already, which was a major buff to my Ranger (2 offhand attacks). That wouldn't have been possible without it being a BA.
Last edited by TomReneth; 04/01/23 12:58 AM.