Whenever a takeover takes place (I'd rather call it a merger because BMEd wasn't exactly a minnow of an airline), there is always some fallout. At the end of the day, all staff have the option of staying and being positive, or leaving. Staying and being negative is no help to anyone and will always cause friction.
So decide.
There may have been differences between the BMED and bmi management style, but the bmi team are running it now, so you have to decide which way to go. Many people don't like change and yearn for the "good old days". Well they're gone for most jobs.
You may think that the grass is greener on the other side. Well be careful, often it isn't - it's bare.
Skintman