Looks like you over-mystify the signatures, they're all pretty much straight forward.
But before you start a discussion about 'cherry picking' you should clarify what 'cherry picking' exactly means to you. Preferably in the OP and not somewhere buried in this thread.
There are 4 basic forms of 'cherries' (leave alone some minor variants in between):
B) First discovered/mapped by tag
D) Certain aesthetic aspects like for example rare orbital constellations or unusual collections of gas giants
A) Nothing is over. You even can still cherry pick in the bubble by starting with opening the local map while fuel scooping. In the bubble most systems are already discovered, which you've already have recognized. But what you also should have recognized is that many bodies in such systems still have the unexplored tag, which is the one that actually generates the money for you, as the game treats both what others have done and your own progress separately. Since 3.3 you even don't need to honk to see if there's an ELW or water planet by just opening the local map.
From here you have 2 possibilities: either honk and do the FSS minigame for this certain signature. You even could use the local map body to target and point your ship towards it, then after entering the FSS it's directly in front of your nose so you even don't have to search for it nor do you actually need to fly that 300Kls for it just to get the discovery bonus. If that's not 'cherry picking' I really don't know what is. Or fly to that body if you also want the mapping bonus.
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B) all you have to do is making up your mind and push your travels fast forward while still enjoying the readily available local maps - until they are not automatically rendered anymore (but still show the main star and a few nearby and/or massive objects) and you'll step into uncharted terrain. That's where the fun starts, at least for me. Here you can still decide if you just want to cherry pick all the 'valuable' bodies, including all the terraform candidates, which you only see in the local map after a proper scan with the FSS. For these you won't need to do a full system scan though, just a little experience to exclude a wide range of non-candidates. Or...
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C) if you are some sort of a completionist, I wonder what you have done before. To discover each body you would have to do a surface scan which means you would actually have to fly to each body. This is magnitudes faster now with the FSS. The only reason to still fly to a body is mapping now - and that's something new and not comparable to the former ADS mechanics.
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D) is actually the tricky one and that's where I can understand all those explorers who are mainly interested in these. They are indeed somewhat hampered by the new mechanics, at least in uncharted systems. But even here and with a little experience and intuition, you can easily filter out >90% of all systems. The new bubble mechanics actually help in learning these things, if you first look at the signatures
before you open the local map. You will very soon learn that it's not very difficult to explore in a more selective way without missing any interesting stuff. If you don't believe me, check it out and convince yourself!
Making up your mind is all it costs.