I think they're on to something when they say T4 and immune to panic when joined by a GotE, I would also add tho that you should get one unit as core if you have a GotE, would give you the possibility for a great Anchor for you line when you go with the general.
Also second the magic banner thingy, probably 25pts, we arent all that magic centric as a team.
Another idea would be to make them felxible, if you read old manuals on fighting with the Zweihänder, the long grip was for the times when the soldier gripped up on the dull part of the blade(the first 30cm or so) so they could use it more dexteriously. This could be represented by allowing you to choose between fighting as a halberdier or Greatweapon every round of closecombat. It would make them stand out^^.