This wouldn't be the craziest but arguably the burning maul light attack is useless besides closing the gap a little bit. Other than that both in pve and pvp it's lackluster. Doesn't do enough damage against guardians or enemies.
So about a slight buff. Not to damage although that would be appreciated. But more let it home in a little bit and do not let lose momentum. Let's say the servitor boss in gambit shows up. Burning maul can keep hitting that. But imagine not losing momentum. That the hammer just keeps spinning against it mid air. I think that would be cool and not OP at all considering the damage it does.