Uh, CT isn't there to help sprouts progress MSQ, its there so sprouts have a chance to get tomes as well. Since its the only MSQ required alliance raid series; it makes sense to compile everyone together at the lowest and required raids so people can farm it without waiting for queues. If MSQ finally makes the Void Ark series a requirement to do for the story; they can start doing more events based around it. CT however, will always be top choice for these events because it reaches the most players.