In the system map, all you had to do was honk, open the system map, target the body and listen. That told you exactly what type of body it was, then fly towards it to scan. It was very easy. In the FSS, you look at the wave forms to see if the body is there that you want, then use the FSS to discover it (this is already taking significantly longer to do), once found after probably FSSing he whole system, select the target and fly towards it, then when you get there you need to map it. All of that takes far longer.
Wait, what? Is it me misunderstanding you, or do you really mean to say that the FSS isn't easier? Scanning bodies becoming faster and cherry-picking body types for systems being easier was much of its point, with this being promoted by the devs on stream.
I mean, the planet sounds -
if you knew about them, which many didn't - would only tell you what it was if you recognized them. Good luck telling apart various gas giant classes, for example. Granted, that wasn't important at all then, but for cherry-picking biologicals, it is now. If for example you were looking for amphora plants with the system map, you'd have a
much slower time (gotta check for the presence of metal rich bodies
and an ELW/GGWL/WG) than you do now.
After all, the FSS tells you with absolute certainty, at a glance, all the body types there are in the system. If you are uncertain about what's at a barcode position, the game even tells you what exactly it is if you move over it.
And well, the developers themselves repeatedly promoted the FSS with being much faster at scanning whole systems. No flying involved unless you want to map something, and that's only done to a body or two, either if you want to get more credits and tags or if you know a POI you're looking for is there. Unless you are specifically looking for geological or biological POIs, which very few people do - all they are for is to loot materials, after all. In the absence of other, more interesting stuff (like the better xeno and human POIs close to the bubble), many just ignore looking for those... especially given how long you have to wait for geologicals.