So by 'cherry picking' since you mentioned a 'mercenary approach' I assume you're thinking of people who scan only high value (in credit terms) planets?
Are you willing to accept that players may have reasons other than a credit hunt for being selective? Asking because there seems to be a near-universal assumption that it's all about credits when as many players have already commented in the previous 200 pages, much of the reason for being selective has absolutely nothing to do with credits.
It grinds my gears in particular because one of the things I've always looked for when exploring is terraformable words. Say that to someone now and they're automatically going to assume it's about credits but it's been a motivator to me since long before the buff to exploration payouts saw them paying a fortune for first discoveries. It was actually some of the very small amount of roleplay I employ when playing the game; searching out what are potentially colony worlds. Seeking out potentially colonisable areas and areas rich in natural resources was in fact one of the main motivators of all of the great voyages of discovery in human history. That's exploration - it's not even a debate.
Other than that I'm looking for things that I find interesting or attractive. I couldn't even begin to give you a detailed list because it is in itself subjective - often you don't really know until you find it. Again, that is most assuredly exploration.
Finally I have an ongoing mission to discover high-G landable worlds. They're almost exclusively worthless in credit terms since they're bog-standard HMCs the vast majority of the time.
They could put the credit payouts back to what they were when I earned my Elite exploration rank before the buff and I wouldn't bat an eyelid.
There's nothing praiseworthy about habitually scanning everything in a system either by the way. People do it either because they find it entertaining, which is the entire point of playing a computer game but means they're doing it purely for themselves, just like I play the way I do for myself, or because they feel it's the 'proper' way to explore. Anybody who does if for the second reason and feels some kind of compulsion to do it even if they may not always enjoy is is a fool.
This is a game. We aren't compelled to do anything. It's supposed to be about having fun not having a second job, despite the fact that some people seem to treat it like one both in terms of the seriousness they attach to it and in the way they seem to think people should accept a certain amount of drudgery as being part of the overall package. That's an approach I've always applied to life because if we don't, we're going to spend a hell of a lot of it miserably fighting against things we will never change but it has no place whatsoever in a leisure product which we play voluntarily to make us happy.
Of course the motivations for cherrypicking are varied. But I would suggest an approach like yours is more the exception than the rule. And in any event, from a scientific or possible colonisation point of view, if we were to roleplay this out, having found and scanned only such objects (as terraformables or earth-likes) is only part of the picture - one needs also the other objects in the system, and likely neighbouring systems as well. That's what I do when I find an earth-like.
But as I wrote, cherrypicking is not an invalid approach, just not one I agree with.
I would argue the exploration mechanics proposed are what we should have had from the start - an initial honk to detect objects (but not to the point of being sure what they are), further scanning to get more detail on each object (eg planet type, composition), additional tools to then actually map the surface to identify locations of interest or resources. Bring on the beta with the proposed mechanics I say, then let's see just how it is before we get too carried away.