I suspect the rumoured EM catapult equipped 076 might have something to do with using UAVs at sea.Right, if the desire for a twin seater is the battle management/command and control capabilities, then that is reasonable... Though I must say I am not yet sure what the future of MUMT and loyal wingmen UAVs will look like for carrier aviation.
A big reason why MUMT/loyal wingmen make sense for land based air forces is the ability to employ and recover relatively large numbers of UAVs at conventional airbases.
I am not sure how that will translate for carrier aviation as I believe the carrier flight deck and hangar may produce lower limits for the scale/size of UAV formations they can generate.