My problem with the FSS is the initial honk doesn't provide enough information to make any meaningful decisions. You pretty much
must do the FSS dance to tell whether a system is interesting to explore or not.
However, I do not want the ADS back. It was a one click wonder, far too powerful, and it made exploration un-interactive and dull.
Xloubell has already said how I'd like to see the FSS improved upon:
Honk reveals everything but you either have to fly out or FSS to get the discover tag. Based on my extreme lack of scientific knowledge.
I'd modify his statement in that I'd like the Honk to not reveal everything, but only reveal the Orrery Map and provide the nav list page in the left cockpit screen while NOT providing planet textures. Textures would only show if you used the FSS to get them or if planets had been already discovered by a previous explorer. Basically the honk reveals the system structure but you'd need the FSS to get any body details and data.
This one change would provide explorers with much more immediate info from which to make the decision on whether to stay and FSS or move on. Plus it could allow pilots to fly out to specific bodies without needing to FSS the entire system. For example, it would be very handy for explorers hunting planets very closely orbiting stars or gas giants, or for explorers only interested in binary planets.
Frontier just put too much emphasis on the FSS as a mechanic, they swung too far away from the ADS. The ideal exploration mechanic would be more of a compromise between the two, in my opinion.