This is the thing, I think the assumption is in many cases based an an idea that it would necessarily have to reveal all the blobs in the FSS screen when you honk, were a similar mechanic to part of the lost functionality of the ADS to be implemented as a new module, or engineering mod for the FSS, or whatever.
But that's not the case. the FSS is the FSS. You'd have planets remain unscanned after a honk just as they do now.
Being able to choose to fly to objects to scan them instead of having to play the minigame in many cases would actively take longer. Knowing they exist is no more information than already having the blobs in the FSS screen. You still need to target the blobs and filter the spectrum correctly to get the tags, or locate them and fly to them as many do with parralax already (Personally, since the FSS was implemented, I will only FSS for gas giants, then fly to them in order to discover anything orbiting them and see if there are any interesting systems, since it's more enjoyable than sitting tuning the FSS to every possible body orbiting each giant). The cherry-pickers the FSS caters to can still drop into a system, tune to the ELW band, scan, and leave, while those of us interested in personally visiting interesting features can look at the sysmap and decide if it might potentially be likely to be worth flying to anything. We might also choose based on that data to drop into the FSS and scan a couple of things to see what exactly they are before making that decision, nobody loses anything, but we gain options.