As far as i understand, the most common strategy of combat is using high UA combined with a meele weapon, without having any points into MC, as the "finisher blow" damage is taken purely from weapon. This leads to MC being fairly inferior to UA. Not only MC is slower to make openings, it also requires you to have your hands occupied (or at least one hand) with weapons.
My solution, which will probably be hated by 90% of the current meta community, would be to make UA more similar to MC. If you wanted to use a UA attack (e.g. Punch) you would have to have at least one hand free (i mean, you can't punch someone with a sword). It wouldn't completely remove UA+Weapon combat, but at least it would prevent people from punching openings with a two-handed axe equipped.