Remove the cast time on Uppercut. I have no idea why a melee move has a cast time but it shouldn't, that alone would make 2h much better.
But to put it on par with the hordes of light armour staff users you'd need to buff the passives on the other 2 armours Give med a armour piercing skill like light has spell pen. Have heavy reduce cost of stam abilities. Just a few ideas to toss around at the office when you try to fix the balance issues bestween stam & magika builds.
Nelgyntc- V14 NB