Dave, that would meke sense except that the waitlist for 6:00 Traditional is always in the hundreds; so the 6:00 crowd alone would fill the room. The 5:15 was to added to accomodate the hundreds that couldn't get 6:00.
Jan, the only problem with that is Island, Coral and Sea Princess only have two dining rooms; If you put 6:00 and 8:15 Traditional in Dining Room A and Anytime from 6:00 on in Dining Room B, where do you put the new 5:15 seating? My guess is (and it's a variation of what Dave said) they will split Dining Room B: half Traditional at 5:15, half Anytime at 6:00, and then all Anytime when the 5:15 group clears.
Okay, I'm going to go take an asprin now--this is way too complicated :-)