When may we expect the next patch?
This I cannot say - we still on it because other things/bugs (for Game Master mode too) needs to be addressed as well.
Opening a saved GM campaign with the editor, edit it (including PCs) and resave it, could be an option right?
GM campaign data is pretty modular from data perspective. Every time you load a GM save game - its being extracted to
"Documents\Larian Studios\Divinity Original Sin 2\PlayerProfiles\<Profile Name>\GMActiveCampaignSession" and has same structure as campaigns inside GMCampaigns folder
You can use needed data from that folder.
1. Globals.lsf - for you player characters and their inventories + gm inventory + global game stuff
2. LevelCache folder + GMScenes.lsf - are scenes you created and used
3. Eggs.lsf for exported items and characters
4. Notes.lsf for Stickies
5. OverviewMaps.lsf and Vignettes.lsf with appropriate folders are responsible for you maps and vignettes.
meta.lsf is a file that contains info about all mods connected to campaign ("Dependencies" node if you convert it to lsx format) + its own info
This is not official way- just more of a modding workaround but if you players don't mind some file management and willing to take a risk:
You could create new campaign with mods you need - copy needed files (except metadata.lsf and globals.lsf) into that folder and then start a new session - all data should be there. But be sure to make a backup just for safety
If you into advanced modding you could try to create a new campaign with same name with needed mods or add mods to existing prepared campaign (one you started) and do some source magic.
It's dangerous to go alone, though. Take this:
http://larian.com/forums/ubbthreads.php?ubb=showflat&Number=624173 (topic)
https://s3.eu-central-1.amazonaws.com/nb-stor/dos/ExportTool/ExportTool-latest.zip (tool)
Open savegame of the your session with that tool and copy there meta.lsf from newly created campaign (you will find it in "Documents\Larian Studios\Divinity Original Sin 2\GMCampaigns\" - if you created new with the same name - be sure to pick correct one), pack back save game and you done.
If you even more brave - you can just edit meta.lsf from your save file by converting it to lsx, adding needed nodes with dependencies by hand (you can use any text editor for that - i prefer Notepad++) and converting back to lsf and packing save file back.
