It does seem, for now (or ever), that things are on hold regarding the "new operator" from SEN. Thinking back, I did wonder if the suggestion of 20 routes was a back-up plan just in case the current deal with FlyBe was to be terminated, for whatever reason. I failed to come up with 20 additional destinations, but Stobarts still predict there will be more routes to come in the future.
I did receive a couple of personal messages from people closely connected to SEN who felt I should not have surrendered such information at a stage when negotiations were taking place. One even suggested my words could harm the situation.
Unless the owners of all these factions actually log in and take notice of "rumours" on pprune, i doubt it, but of course staff may well be spies into all these plots.
I never named the airline concerned so doubt if I had a big effect on it all.
For now, this subject, and the visits by Wizzair to SEN, seem to have no immediate fruitition, but I am quietly (sic) confident SEN will be offering more routes for 2019.