The two co-exist well at MAN which points to some strategic thinking perhaps with MAG & they the airport operator are aware they can.I doubt MAG would work up EXS to lose EZY.
easyJet moved into MAN after starting at LPL, the MAN was positive and a little aggresive. Whereas STN has been static for ages, no real growth agenda and then sit back and let a new competitor drop 17 based units into what was GO's biggest base.
They don't seem to have a firm idea of what they want at STN IMHO.
I doubt MAG would work up EXS to lose EZY.
If EXS are serious about working about to 17 aircraft MAG would cut easy loose in an instant, they've not shown any drive to grow STN, indeed with going into SEN, quite the contrary IMHO. EXS look like being a better fit for STN it seems.