So I added 

CopyMightyScript command, which copy the current MS state into it's own pastebin, with an optional file path argument, if it exists will try to save MS into the file

ImportMightyScript command, it will use a file path if provided, otherwise the pastebin. This will nuke the current MS /!\ and replace it with the copied one. Obviously any world reference will be all over the place. Invalid ones will be removed but overlapping IDs will remain, but invalid. (Like I copied a script, it was waiting KO on a unit, I imported it in another map, and the KO ended up listening to an impenetrable wall :D)

So you still can share scripts, it's just not as nice as on the workshop ^^'