[Yen]

I can see some use for GS2 in the offline editor, but compatibility with the NPC Server and other players is a really big issue that can't be simulated in offline mode.

There's nothing wrong with flooding RC, I do it all the time. I have this nasty habit of saving the script every 5 lines.
Also, assuming you're on Windows, you can right-click > 'Open with..' > 'Choose program' > Browse to 'GraalEditor.exe' > Check off 'Always use this program'
Now, you can just double-click the level from your RC's FTP. It'll open it with the editor. When you hit Save, it'll automatically upload itself.