Slowbro can easily get 2HKO'd by Brave Bird/Return with CB. Steelix can get predicted, and get 2HKO'd on the switchin. Same with Aggron/Rhyperior.
If people are so worried about prediction, you can also run a Sub/Roost set, and beat things that would love to switch-in on banded/scarfed Raptor.
But yeah, BL ftw. xD