Since Karrock has graciously volunteered to sit to help in raid progression, I thought I would bring up the simple point of contention that he's missing, since he's a mouth-breathing idiot:
DPS is not being allowed to sit so that an extra healer can run. At this time, only healers are being asked to sit.
Which leads to the obvious follow-up question of, even if they're not being ASKED to sit, can DPS OFFER to sit, to allow healers to continue gearing?
Which means, when (as has happened so far, on almost EVERY SINGLE NIGHT we have raided) a raider isn't available, we don't necessarily try to replace that raider with the same type. We simply run with an extra healer. Or, we have a healer DPS. I don't think it would be unreasonable to have the raid bank split 50/50 the costs of the two respecs for a healer to switch to dps for a night and then back again. Or, we could ask for volunteers - you pay your own respec costs, but you get a DKP discount on any items you bid for that night. God forbid we try to get the crappy mod to do something even more complicated.
Consequences of this are clear: DPS races might be harder. Balancing things might be trickier. But, to me, this seems like a fair balance between helping raid progression while not unfairly putting a burden on a single, hard to replace class.
Now, on to the reason for all this: Conversations about Ulduar and what may or may not happen when that content arrives are not reliable and barely relevant. You can't predict the weather a week out, so there's no way of predicting what will happen in real life to 26 different people two months from now.
Although I hate to see it happen, it isn't just possible but probable that between now and Ulduar someone will have some crap come up and this entire conversation will be a moot point.
And, since no one has yet been asked to sit, clearly, what we're currently doing is working.
To me, I see it as two options:
1) Decide what to do with 26 raiders now, and prepare for content that is two months away.
Pros: We'll be ready to jump right in to Ulduar immediately and compete for server firsts.
Cons: If we decide now, we may or may not cause some angst.
2) Hold off on that process until Ulduar hits and worry about it then.
Pros: We'll get back to the business of having fun with a game instead of having this hang over our heads and being resentful of each other.
Cons: We run the risk of the problem not going away, us having to deal with it on a larger scale later, and not being ready for Ulduar immediately when the content hits.
Make up your minds already, you bunch of goddamn monkeys. It's not rocket surgery!!!