It is very easy to interconnect a force-feedbacked sidestick. I know the DLR developed something like that on request of airbus about 25 or so years back, but it was ditched because it cost a few bucks more.
For me the ideal airplance would have the spacious airbus cockpit with sidestick, but interconnected ones, moving thrust levers and overall the boeing flightcontrol philosophy as well as their EICAS.