1. Not really, tank spots are usually filled quickly in raiding guilds
2. Content is getting a little stale at this point, but being that we're likely to get tier 12 within the next 6 weeks it's not really a concern
3. the MT role doesn't really exist anymore, you're a tank or not a tank. Anyone who can play competently can tank. there is still a large difference between a competent tank and a better than competent tank. Tanks shouldn't be Divas.
4. Doubtful, nostalgia is a poweful hallucigen, but i wouldn't give it up
5. Depends on the player, I've had alot of fun in 5 mans, with my guild but that becuase of the peeps i'm doing it with not the content i'm doing. Rep grinding is hardly evewr fun for me.