Currently look at how "involved" the carriers are. Their role in GWOT is absolutely miniscule, they're practically without any role whatsoever even in fighting pirates.
You don't need 11 of them prowling the oceans at this time.
You very well could get away with maybe five at this time (that would be more than enough) with the rest in storage and their crews being trained on land based simulators. Would be easier on the families as well.
Of course in terms of storage, they would be in a state where the crews could climb in and get them running like normal in under 2 months. Means that when the global situation makes carriers relevant again, they'll be out and about in no time.
I understand the benefits of a moving airfield, but at this time, they're not that valuable.