I was BiS Feral, back in cata when Feral was cool. Splitting off the tank abilities and removing the aoe (roar, swipe) ruined it for me. I've tried all 4 specs, and although druids are now OP, resto/FC is the most fun, imo.
The old feral guides should still be relevant since the available gear hasn't changed much. But, you should heed TwinkO's point; we don't know how changes to scaling will alter things.