I disagree. Isengard's uniformed units are a nice contrast to Mordor's complete lack of uniform.
Even orcs aren't stupid enough to wield their swords backwards, why should uruk-hai be?
I suggested Raiders or Pillagers a few pages back.
Agreed, I like those helmets.
I think they'll have varied paintings, but I oppose armor. They look more badass without it, in my opinion.
They have the white hand on banners. I don't think it'd look very nice on their shields, it'd destroy the "black tide" effect.
There's plenty of variation among the other factions.