PROBLEM

With the new update, radars can now detect sub-bodies spawned within its own creation. This makes the already difficult to use new radars with large noise even harder to use in a meaningful sense, especially for missiles, track while scan, semi active homing, etc.

IDEA

Instead of having 'Time Since Last Detection' as one of the returned attributes from radar composite, you could instead add a "Doppler strength/value" that would help classify and differentiate targets by knowing the magnitude of their relative velocity.

With old radars, it was possible to classify a target based on distance and signal strength, effectively calculating their weight. This provided a very good way of selecting targets.

This "Doppler" value would be calculated as the magnitude of relative target velocity parallel to the LOS, simulating doppler effect in a simple way.

TRADEOFF

Replacing Time Since Last Detection would not affect many creations as its output is almost never used by most creations. The advantage of having this instead of TSLD would be huge for the community.