Its a cool concept in the game, which made sense in native because you're proficient with everything. Right now, when polearmers pick up a greatsword for whatever reason, I think it lowers the speed by 4 or something nutty. German / Danish in halfsword mode is only 88 speed, which is a shame. Should keep its 92, to get a close-in edge. As it is right now, we might as well keep swinging the glaive, right? haha
On a positive note, halfswords do insane pierce damage!