I sm not surprised by the fast pace of the development. The airframe appears quite conservative. The electronics are probably derived from models already in service.
not so quick
you are balancing a huge radar on top of a small medium sized aircraft
then you take this aircraft and launch it from a carrier
and then you ask it to land too
the aerodynamics and physics involved here are very difficult to master
and the fact that really USN is only the master at is says alot more
Soviet tried but never really succeeded with the Yak-44