I see. This makes sense, and actually goes back to a suggestion I believe Saud made several months ago (which I had forgotten about since then), a default Raid Role, which the members can choose themselves.
LOL apparently you aren't the only one. I think my entire suggestion back then was 2 things. Auto determine the roles by class and spec. Providing some mechanism to define what minimum point in a talent tree determine if a Paladin is a healer vs a tank vs dps. Then make it manually overridable on the character profile (with options for only those with correct privileges to set them or the user) in the event that talent specs aren't loaded or are out date.
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Six Demon BagJack Burton: Hey, what more can a guy ask for?
Egg Shen: Oh, a six-demon bag!
Jack Burton: Terrific, a six-demon bag. Sensational. What's in it, Egg?
Egg Shen: Wind, fire, all that kind of thing!