Yes I understand what you mean but I thought air blue was doing very well at BHX which they must have had an idea it would do well or like you say it would have been better to have kept the aircraft grounded until they knew the situation with Saudi.
Now they know what the loads and yields are like at BHX which from what I've read on here and other forums have been good then they will probably be back when they get more aircraft.
It will also be interesting to see how many passengers will get a refund and either not go at all or decide to go with PIA instead and how many will take the journey up to MAN.