No it would reek of WoW...
Uhhh... how? Maybe WoW Reeks of Fallout.... wait Nvm that aint possible Fallout is way better. Alot of MMO's have taming not just wow. That should not prevent the funnes that could come from haveing a mutated animal.
It is just like a companion, you can only tame 2 at any time, and only have one on you at any time. It would be nothing like WoW, i highly doubt you will sit there taming a deathclaw and say, "Eww, this smells like WoW, or maybe Deathclaw Dung."
Taming is a great concept to add into RPG games, it adds an entire new way to play the game. Just adding in a simple Taming Perk could add 50+ hours to the game, and if you don't belive me read what people have said about this idea.
There would be quest you could do, in wich you have to tame animals for people, there would also be tons of creatures to tame, and even be able to pit your animal in the thorn, or against things in Ceasers Arena.