Don't blame Werdum. Dude fights hurt all the time, was going to fight hurt against Cain, Cain pulls out for an injury that Werdum basically already has because Cain is a ..... well, because Cain is Cain. Last-minute guy gets thrown in who has a completely different style.
Seriously, Werdum is like that chick you call at 2:30 in the morning because she's always gonna be down for a late-night visit even after you strike out with better-looking girls. But then she starts going to the gym, cuts her hair, gets a good job, and stops returning your calls.