Brug let me interject a little thought here. I myself have felt similar to your situation, not getting to go to Kara etc..for numerous reasons never because of spec. I have however respeced a little for the sake of a raid as it was mutually beneficial for myself and the raid.
Another for example..back before the rise of TBC where roles were a little more easily defined, I respecced Holy(I know I know, a great shocker there) not because I was asked or made to respec but at that time for the sake of progression in MC, I respecced Holy for the benefit of helping the guild as a whole and as time progressed and more Holy spec priests leveled or joined the guild, I returned to my first love Shadow. In the same aspect there were times in MC my priest wasn't needed but my mage was. Though I preferred playing my priest and the gear benefits were more needed for my personal playing on Alhana, I used Gnimish to the benefit of the guild. As a result I can with almost complete certainty say I am probably the only Priest in guild who played MC to never get Anathema/Benediction staff.
I say that to say this, great effort was made by the guild at numerous times to help me get the staff although to none avail, but because of my willingness to help the advancement of the guild great pains were taken to help try and get Benediction for myself. It's about giving and receiving, though it may seem you give a lot with little return. I can positively say through personal experience that it pays off in the end.
On a side note, I'm making plans to go into MC to secure my old world Staff, all are invited who will come.