I think a lot of the objections to the recent and current radar tests could be addressed by adding additional delay to the "enhanced" radar.
So, keep the current short (2 sec) delay within working friendly radar circles so it acts like "radar" -- near instant information.
Add delay (10 - 30 seconds ?) to the distant radar to simulate the time it takes for ground controllers to relay enemy contacts and ground observations to aircraft in flight. This would show areas of activity, but not be a substitute for SA.
Also, make the base radar the same hardness and downtime as hangars, unaffected by the radar factory strat. Make the distant radar delay variable, based on the condition of the radar factory strat. So, base radar could still be deliberately destroyed -- but not for hours -- and there would still be a good reason to attack the radar factory.
Yet another two cents in the radar sweepstakes kitty...