The minor reduction in Thomsonfly scheduled flights from DSA is disappointing but not a disaster. They appear to be concentrating on routes they are likely to fill. If sales go well they may add add extra flights, but in view of current high fuel costs they won't do this unless they are likely to get a good return on their additional costs.
However they do appear lacking in enterprise - the reduction in Pisa to one flight a week is a case in point. They've eliminated the short break market and restricted themselves to people taking a full week - hardly likely to attract the more wealthy frequent flier market.
If Thomsonfly do indeed have some sort of hold over DSA then Peel have to decide whether this is good for DSA in the long run - or would they be better allowing others take over routes currently monopolised by TOM.
Long term I'm sure the fiture is bright for DSA but it will take careful management to maximise the growth rate.