I already have another feature request.
Make it possible to refactor content out to an existing note, i.e. append selected text to an existing note.
To me, the ideal UX for this would replace your existing filename modal with something that emulates Obsidian’s “Open quick switcher” command: as you type a filename the vault is auto-searched for existing files to choose from, or press enter to create a new file. But whatever is easiest / makes better sense, I support.