The approach radar function for Doncaster is already done from Liverpool and a huge amount of technical and management effort was invested in achieving that. It's therefore sensible to place DTVA on the same footing. Anything that saves costs at DTVA may help to keep the airport open so it seems to me it's something to be supported. They've already doubled-up a lot of the ATC jobs between DSA and DTVA. If the radar controller jobs all went to Liverpool you'd still have tower controllers at DTVA. You surely have to accept that, with the tiny number of IFR movements at DTVA, you can't expect the owners to keep paying ATCOs to sit doing nothing for much of the day.
NS