That doesn't fix the underlying issue of the potential dmg that GWM gives you. I am not a full on min maxer but having a feat that is objectively so much better than basically all other options makes it hard to ignore it. The only true choice is between GWM and Sharpshooter. But they are the same, just one uses two-handed weapons while the other uses ranged (and you will end up with heavy crossbows). An extra feat won't make a dual wielding fighter outperform a great weapon master.

And I am not necessarily just talking about BG3, I don't find the game particualry hard even on Tactician, so there isn't a need to cheat to make it easier. And I am not using any broken builds either. Mostly sticking to builds that fit the theme of the companions.