Hi aeroDellboy and welcome to PPRuNe!!
The big problem for MME for a while has been connections to transatlantic flights. A STN link would be a great thing, but whether the airlines agree remains to be seen. As for the BMA based crew - I believe there are still cabin crews based at MME, it is just flight deck crew who are seconded from other BMA bases. I'm not too sure though how many cabin crew we have at MME these days?
I have to say though that the AMS link with KLM is fantastic from MME. I used it myself in August and found the whole experience so easy to use and relaxing. One thing is though that the check-in machines in AMS have Tees-Side as the destination, the cabin crew called it Durham Teesside and the flight crew called it Tees Valley!! Oh well, close!!
-HD-