That's a little extreme.
Magmaw: The skeletons should be in melee for cleaves anyway; it's not a stretch for a feral to apply dots to Magmaw and to the skeleton.
Omnotron: You're only DPSing one bot at a time. Besides that, feral charge is broken for getting out of Grip of Death. Not to mention Swipe on the poison protocol slimes.
Maloriak: Yes, boomkin rapes ferals on this fight. I'll give you that.
Atramedes: I'll take my increased survivability + dash(es) over being able to hit him a few times in the air any day.
Chimaeron: Terrible fight for everyone. If you get debuff, you suck. If you don't, you still suck because of Feud.
Nefarian: Don't know about this on heroic.
Halfus: Decent ferals will have multiple bleeds rolling on multiple targets; it's challenging but doable.
V + T: I don't see how boomkin beats feral here. All I've gotta do is stand behind the boss and do work; boomkins gotta move in and out for Engulfing Magic/Meteor.
Council: Don't know about heroic, but I can see boomkin edging feral here too. Too much movement.
Cho'Gall: Don't know about heroic; boomkin edges feral only for the adds that are kited to the back.
No clue about Sinestra.
Conclave: Standing behind Rohash is really easy actually. Tornado dodging is fun.
Al'Akir: This fight sucks. Period.