I feel like they would definitely lose proficiency, but I feel like they should have to make checks for maintaining a defensive stance with an unwieldy weapon. So instead of disadvantage on attack, they make an athletics check or opponents have advantage until next turn.

I feel like they would definitely lose any proficiency bonus, but also they should have to make checks for maintaining a defensive stance with an unwieldy weapon. So instead of disadvantage on attack, they make an athletics check or opponents have advantage until next turn. I feel like it’s more disadvantages from how you defend yourself that round waving a big weapon in one hand, and strong characters should be better at that type of thing anyway. Center of gravity could be thrown hard at an opponent accurately but set you off footing that round.