Psst.. you don't even need proficiency in the weapon.
I love the way my rogue drags her greatsword along the ground behind her as she "sneaks up" on the enemy.
I'm sure this will get corrected though, it is a bit silly.
I considered that may be the case, but I do like the +2 bonus to hit. I kinda want to test if you can use GWM without Prof as well for a total loss of -7 to hit lol.
