Again the same point. Why only pikes? A polearm with heavy tip should all then be unbalanced surely?
Length. A 155 length Long Hafted Blade will be hard and unwieldy, but I would assume a 300 length pike would be harder to wield around based on the sheer length of the weapon.
And, just a thing to keep in mind, the pikes in CRPG are fairly small, compared to pikes used in armies in the real world, assuming 300 length would be say, 3 meters, though I'm unsure of how the length measurements are scaled.
I'm not saying that I'm right, of course, I'm simply trying to verbalize my view on the subject. What the devs do to the weapons means very little to me, as I'm over the whole whinefest of the game's balance issues. If people were to take my suggestions in mind, then that'd be cool, if they don't, I don't really care.