I'm sure STN can do better under new owners. I don't think they need worry about EZY's small operation from SEN, an airport which can never climb above about 2 million pax per year and which can be sustained by its own catchment area without taking many away from STN's. STN should be supplying a regional market and could target specific long-haul destinations - why not go all out for the East Asian destinations which LHR is struggling to find slots for? I'm sure MAG will have some good ideas; they've taken Manchester to heights that few of us who lived up north in the past can believe.
Stop worrying about SEN, LTN and LGW - there's room for all of them alongside a revivified STN.