Surely the smart way to go would be for the low costs to have a decent base (a la Easy and LTN) and have decent feeder services from LBA, GLA, etc.
It would be nice to have direct services from the regionals (I always thought those places with large student numbers would be a good bet - get them all off to Ibiza and EHAM for the weekend!), but Joe Public really can't be bothered and would rather nip off to First Choice and book a package!