At least BE have made a decision to cut costs, and the best way to do this is to remove a aircraft type.
I have been critical of BE in the past... but finally they seem to be getting their act together!
Like most regional carriers BE have found that its much easier to make money flying on routes with no competition. Many of the thinner routes that BE operate on would not support a second carrier (all routes ex EXE) or Jet operations (All routes ex EXE).
As The CRJ would not suit EXE, and cant operate into LCY, it leaves BHD, which is coming under increased low cost pressure.
BE will probably follow BRALs smart scottish move and exit BRS and STN - Belfast. Hence the need to remove some aircraft from the fleet.
With the RJX replacing the 146 and the Dash operation firmly in place... it leaves the CRJ as the weakest link.