I needn't belabour this post too much, the question is relatively simple:
Which would you, as a warrior, prefer to see in the game - Rend or Colossus Smash? The reason this is the either/or combination is because removal of Colossus Smash would mean something would need to replace it, and Rend was an iconic ability before it got cut (and it's been discussed recently).
Essentially, I felt the loss of Rend quite keenly because I liked it in both Arms and Protection and it gave an extra level of depth to the class as well as a contribution to the skill cap. It's an obvious choice for a rotational ability that applies a passive snare, as well as being a way to keep contributing meaningful damage while being kited and/or controlled. If it was baked back into Taste for Blood, the talent would actually make sense.
Colossus Smash, on the other hand, is something I hate. It's been a balancing nightmare to the point where it does something different in PvP and PvP, which makes us burst-bots in the former and causes clunky, unwieldy consequences in the latter.
So, which would you prefer (other options also listed)?