There's no indication AJet will be impacted as yet, just speculation on my part. I'm not sure what the capacity declaration for S26 will be as yet, if any change, but interesting that TK have managed to get some night-stoppers in there.
Becoming a decent little build-up of full-service carriers now with Emirates, Turkish and Royal Jordanian plus the limited Air Algerie, Royal Air Maroc, Lufthansa and of-course the weekend BA CityFlyer programmes. Be interesting to see what else happens in future. Qatar passenger ops I feel are only a matter of when rather than if. Lufthansa or one of their affiliates maybe doing something a little more regular? Icelandair I could see a strong contender in future as well. When they developed the additional hub bank in KEF they did look at STN but secured those slots in LGW (the one that departs LGW around 1530 or thereabouts). The Play route at it's prime was handling 60% of it's traffic as US originating passengers so I'm told, so there's a proven market there. The biomedical sciences in Cambridge would also be a good sell, for Boston connections in particular.