I'm sure that the new SEN management are working as hard as possible to attract "a major carrier" and that they will offer as competitive a deal as they reasonably can. That is simply the norm these days in airport/carrier negotiations but it still isn't always the deal clincher. The overall economics have to be sufficiently attractive over the medium to long term and airport-related costs form a relatively small part of that calculation.
As for the "sort it out lads!" comment, the "lads" are led by Glyn Jones who certainly has sufficient relevant experience to produce positive results where that is realistically achievable.
I get equally impatient with the slow progress at SEN but it's an industry where patience has to be applied within negotiations.