Title pretty much says it all. Are the bonuses good enough to get you back to tanking random heroics or tanking more of than you have in the past? Basically will it help anything.
Personally, My dk is an alt and his tanking spec is his off-spec specifically so I don't have to wait through dps queues. Most of the time I end up solo queuing for randoms as a tank so I don't expect the change to affect my behavior much.