You can already fly to hundreds of destinations from Blackpool. The sensible option is to fly people to a hub-and-spoke airport such as Stansted or Dublin, and if you pick up passenger traffic for those destinations as well, so much the better. Ryanair are not a charity organisation.
As for the PA31 operation I wish them well, but the choice of aircraft leaves absolutely no flexibility, even a Trislander makes better sense. Does it operate with some kind of subsidy?
Another Blackpool problem for inbound passengers is the lack of decent 21st century standard accommodation in any reasonable volume.....thousands of awful little boarding house/hotels just don't cut it any more.....you need affordable quality and plenty of it.
The state that the Vulcan got into due to years of neglect was a good illustration of the overall Blackpool problem. My best suggestion is to invest in a runway extension of at least 500 metres and provide either a turning loop or parallel taxiway for R/W 28......drag the airfield out of the Dakota-strip era.