CabinCrewe - STN might not be the best comparison to EDI, since LH very much still serves London - it just happens to be from a different airport in the same metropolitan area.
A better comparison airport which has had a substantial Ryanair service for a significant period of time, is the sole airport for a medium sized urban area, doesn't act as the principal base for an airline with a large number of planes, and can attract inbound tourism might perhaps be Marseille or Porto.
I don't know much about route changes in the last few years at MRS or OPO - if you have any knowledge of this, I'm sure we'd be very interested to hear how you think Edinburgh might look in a few years time.