I can't see the service being effected too much by the reconfiguration. A majority of the service (drink and biscuit) can be contained in the one trolley. Even a light breakfast/sandwich and drinks could be all be done by the same trolley.
On the few routes where a hot meal is provided, more thought would be needed but it can still be done. A large oven up front and one at the back will be absolutely sufficient. There is no need for these to be served on a full size tray, so you would easily have the space to do so.
They're a profit making business and have to do whatever they see fit in order to provide long term profitability and stability to their short haul operation.
I can't see BASSA allowing up to 186 without an additional crew member, so Indont think passengers will notice a difference.