I actually realised something which debunks one of the criticisms of adding a mechanism for exposing unexplored planets' locations prior to scaning with the FSS when I just dropped into a previously scanned system.
Specifically the argument that you could point your nose at something targeted via the navpanel, switch to the FSS, and immediately scan it directly ahead of you.
Many seemed to be operating on an assumption that the FSS is always pointed directly ahead of your ship when you enter it, but that's not the case, as I just discovered when I selected an unexplored landable in this system to begin flying to it and DSS it, but halfway there, decided to throttle to zero, hop into the FSS and see if I could scan it.
It wasn't there ahead of me when I went into the FSS. I had to rotate the FSS view a good 120 degrees or more to find it, tune to it, and scan it.