Trouble is, there are more tanks required for 5 mans than for raids. So a good portion of tanks won't see a raid because there isn't that much demand.
Yet tank itemization from 5mans is frankly apalling. The shield drop/craftable is 20-30 ilvls behind at the moment. There is a new one in the new non-hero 5man. I do see an issue here when all the raid geared DPS find that their 5man tanks can't hold aggro against them.
So yes, this thing is very short-sighted. A stats stick for hunters is there but no tanking one hander? No tanking shield in the heroic version of 3 5mans? How is that supposed to be good? I can forsee that I will run into serious threat problems. Yet there drop two tanking one handers from the 5man heroics. They will get disenchanted. A lot. Moving stuff like this into the questline would also have helped to unclutter the loot tables.
I have two tanking specs. Now what am I supposed to do with a twohander? It's not like I can devastate or shield slam with that.

