I would love an upgrade, it's through, although I think once radar and missiles are fixed to realistic performances, the plane will be very flyable for low-treath environnement. I think it kind of sucks that every one wants basically another plane from razbam instead of the M2K even though the later just came out...
As for adding stuff to DCS, if it is the first plane with a realistic/complete radar, it is already a great achievement.
Personnally, I'd rather have SEAD capacities that were mentioned in other threads. This would really add to the plane's usefullness.