I'm fine with the addition and removal of those Pokemon, but am not really sure if Xatu should be removed from the threat list. Magic Bounce by itself makes Xatu a threat since it can reflect hazards and whatnot, which is a good niche to have since hazards are everywhere in OU. Sure, there's Espeon, but Espeon isn't as bulky, and doesn't have Roost, Thunder Wave, and FeatherDance, all of which are pretty cool support moves. The thing can even CM, although it isn't really great at it since its weaknesses are too exploitable. I'd keep Xatu there. Otherwise, everything looks fine. I'll look through it again to see if I missed anything.