These are all great ideas, but I strongly suggest making these separate feature requests and confirming that there aren’t already existing requests (hint: there are 
)
https://forum.obsidian.md/t/display-all-backlink-info-and-allow-to-edit-it/4333
https://forum.obsidian.md/t/selectable-text-for-file-name-or-content-in-pane-components/4004
I don’t see a request for your first bullet save pane to file, which is a great idea and perhaps you could narrow this topic to that.