Am I right in saying that you just want the ADS back in the game if so:
As long as it is mutually exclusive with the FSS, thats fine by me. There needs to be some challange to tag systems instead of having them handed to you on a plate which is what it would be if both were available at the same time. Either search for them using the FSS or us the old style ADS and fly in a straight line, not both.
Challenge? Are you saying that using the FSS to locate bodies is difficult?
So long as there's no crossover of targeting information between the system map and the FSS then you would indeed still use it to both locate and scan / tag bodies. There's simply no point in using the 'workaround' of opening the system map, identifying with a degree of certainty a body you want to cherry pick, target it, leave the system map, point your ship at the targeted body in SC, throttle to zero, enter the FSS and then tune the frequency so you can scan it. And that's just one body, I can't imagine what a dismal experience it would be to do it for multiple bodies.
Ok, I'm speaking for myself here, perhaps I'm exceptionally skilled at using the FSS (I really doubt it), but it's so quick and easy to find bodies and scan systems using it, I can only imagine people who absolutely loathed using it would even consider doing the above method rather than just scan the system (or cherry pick the body) using the FSS.
To me, it's just a total non issue. I cannot imagine people playing (and certainly not enjoying) the game by using the locating workaround. But hey, if somebody wants to do it that way, why would I care. To think of that scenario as being some kind of exploit, cheat or easy mode is IMO very far fetched.