I just retired from 2handed to polearm for just this reason, i want somthing comparable to the great long axe in 2handed because i was getting into far too many shield fights with just a greatsword
and that takes some time, they either have to mess up pressing the rmb or i have to break there shield which takes hella long time with swords, the great long axe(polearm) is as long and as fast as the greatswords but has the ability to chop shields but loses a lot in thrust dmg, i don't see why this couldn't be a 2handed weapon or as the OP stated just more variety is always good even if just same stats as some other weapons.
@Heroin better fixed for you, you knew the point of it.