With tier11 being nerfed to hell it's hard to say, before the nerf having a 346 ilvl of the appropriate gear was enough, for a warrior tank you want to be getting as much block as you can, and then spreading the rest of your item bufget between dodge and parry, with a slight bias towards parry. ideally Dodge+Parry+block will be greater than 72.4% so you'll have full combat table coverage with shield block up.
As for hit and expertise, you want as little as each, You probably won't be able to get them down to 0 but you should be aiming for it.
you should be fine for Tier 11 raids, though i would sort your gemming out. You don't want or need +60stam gems. Mastery is your best friend, every gem should be mastery or a mastery hybrid gem.