Rend wasn't an "iconic ability". A warrior's iconic ability is obviously something like Mortal Strike, and Charge. That's what warriors do. They charge at you like juggernauts and blow your head off with a single devastating swing. In this sense, Colossus Smash is far more "iconic" than Rend.
Rend was just a bleed. You just put it up and well, there it is. Didn't care about it as dps, hated it as a tank. Yeah, adds complexity and an extra level of depth to your swishfaggle while you bubble-boo into the dumblefook. Bullshit. It just pisses you off always having to rend one mob before thunderclapping while the dps fire away like morons behind you. I'm always happy when little annoyances turn into passive abilities, always a good thing. Less poop, more wham.