I agree, nice suggestion! To express it another way, it would be nice to have an “All Notes” view, that just shows a flat view of all notes in the entire vault.
In Ulysses for example, there is an “All” view.
For new note behaviour, the current options are to use 1) a default folder that you specify, or 2) the Vault root. 3) There is also an option “Same Folder As The File Is In”. Which would make it in the same folder as your current active note, as far as I understand. I don’t think any of those options would necessarily need to change behaviour, depending on how you are viewing/sorting in your File Explorer. (Or am I wrong?)
In the meantime, it is possible to search for asterisk *, and then “Collapse results”, which shows only the titles. I can’t verify if it is showing every note in my vault. It seems to be. (I don’t think this is a replacement for your suggestion, because you can’t seem to sort or anything from this search.)