Bear has always been a bit underwhelming, for different reasons every expansion. I've always stayed though since I play feral most of the time and it's easy to keep the bear geared then as well. In TBC, WotLK and especially Cataclysm our niche of being able to switch between cat and bear during a fight made the spec really fun if you had a raid team that took advantage of it, but since MoP, the split between cat and bear and the introduction of active mitigation, I really see no reason to roll a new bear if all you plan to do is tank with it.
Honestly, the split between feral and guardian left us with two half specs and Blizzard have not made them whole yet. You're gonna be stuck with a boring rotation with fewer utility spells than all other tanks. You'll also risk going underpowered for months since Blizzard doesn't really have a clue about the spec and the so called experts in the community they listen to are yes-saying weekend raiders.