The number of flights next summer could easily be increased without new routes.
I.e. 2xDaily STN; daily (as opposed to 5xWeekly) LPL; 6xWeekly BHX; 5xWeekly PIK. That's 24 extra flight already by adjusting the schedules on current routes.
AGP and PMI would work from LDY too.
The inevitable loss of RE would mean RYR may be the only operator at LDY next summer. Hopefully, another airline can be found to cover the obvious routes of BRS, MAN and EDI.