There was no engagement to be had. You held a button and had the entire system in view, then afk supercruised to bodies for an idle deep scan. You can see what they alleviated in the design. Though, yes, with what they alleviated they added another issue in that people don't feel a reason to fly to bodies anymore. Of course, there's planetary mapping, but I suppose that isn't the same as the way it was for people. They could probably incorporate some sort of 'black body' feature to the initial FSS scan so that people wanting to fly to the bodies like before can do that, but I'm in no position to suggest it's possible. Simply adding the ADS back into the game might add a conflict they don't want to deal with though.
None of this justifies the removal of the old stuff though, it's just subjective opinion. I miss having it, and spent thousands of hours exploring & discovering things without the new tools. The new tools only add to the old process, the old tools only add to the new process. There is no conflict in process, we know this from playing the game & seeing how it handles previously discovered systems.