What kind of limitation from the initial honk. I don't want to see the gameplay of the waveforms and gravitational distortions become null and void which it will do if we know the locations of the planets in the first place.
Since the honk originates from the ship, it should be able to draw a map of the locations: direction, relative distance (so not: 1,000 ls from honk location, but rather planet B is further away than planet A) in order to determine clusters of objects and trajectories to see whether the objects are linked as they are when they orbit each other. So you would be able to tell there's a gas giant with 6 moons.
This map is static after each honk, is merely a display, so no selecting each object and seeing that selection in the Electromagnetic Scanning mechanism.
The only bit of overlapping information I can see is for instance a system has a gas giant with icy/rocky moons, and a gas giant with HMCs as moons. The second one is the out of the ordinary one, and usually a target for me to investigate. But I still need to get into the Electromagnetic Scanning mechanism, determine by their signatures which of the interesting gas giant is by checking the gravitational distortions with a gas giant like signature.
All I want is an indicator of interesting systems, and this is not possible just knowing what type of objects there are in a system. I would very much like to see whether they interact in that system, because that's where the Stellar Forge is showing off.
edit: and for nitpicking's sake, I am not calling this a compromise, since I believe it takes nothing away from the new mechanic, but rather enriches it. But I can understand that opinions may vary.