They agreed with my points exactly.and people doubted me, shame on you
The fundamental complexity with a feral build is if you have any points left over, you can use these to "cherry-pick" attractive tanking or DPS talents. It would be as if a protection warrior unlocked the highest level arms/fury talents at the same time they unlocked prot talents. You won't be able to pick up every single possible talent, but you can get all of the important ones. One important change in cataclysm is that they bake a lot of the "shared" stuff in... just by being a feral you get a solid package of both tanking and DPS ex-talents and mastery carries over.
For example, a lot of talents in the current build boost ravage and opening a fight. Druids who take these talents will be an absolute menace in PvP, the burstiness ravage spam will be incredibly high. However, those talents may not make a lot of effect over the course of a 6-minute boss fight. You might 'skip' those in a 'hybrid' build, instead grabbing some tanking talents. It is a trade-off, but a viable choice. I don't think those kinds of interesting trade-offs present a balancing issue though.
I would consider it a total failure if Blizzard had a single set of viable cat talents and a single set of bear talents that you had to take every talent in that set, and nothing else, or be ineffective in your chosen role. I think they would consider that a failure as well.