All I can say (as a CSM player) is that no matter how reasonable your comments, they are just going to call you whiners if you voice them. It isn't fair, but then again... life rarely is fair. I will say that Disarm looks like the big "up yours" to all the other Monstrous Creatures (particularly Chaos Daemons) who rely on nifty stuff. I don't like the notion of probably not getting my Black Mace in that fight.
Chaos Space Marine players can't say anything at all negative about any unit in their book without getting lambasted as whiners.