Man, realism is so important. Let's change the game based on realism. Ultra buff to horse archers. Ultra buff to plate. Remove the Great Maul. ETC. ETC. Wait a minute, the game is suddenly massively unbalanced. How did this happen?
Sorry, I hate to break it to you, but Reality was the least balanced thing there was. I'd personally rather see a game balanced based on actual GAME BALANCE, not some random decisions as to what is or isn't realistic. If you want to remove the spinthrust, you'll have to massively change the way stabs and thrusts work, because currently most of the weapons turn into crap without them. If you can convince the dev team to do a massive redo of every weapon with a thrust, as well as changing the way the engine works, sure, fine. Go ahead, it'd be an interesting change. Until then, you'll have to live with the lack of 'realism'.