There is no ETA.
Email your save (or a Dropbox or Google drive link, etc) to supportdos2@larian.com. I can teleport him to the ship in the developer version of the game, which I think should be enough to have everything work properly after moving to the next act.
Each save is a folder in the '..\Documents\Larian Studios\Divinity Original Sin 2\PlayerProfiles\<ProfileName>\Savegames\Story' folder.
In Windows Explorer you can zip file(s) and folder(s) by right clicking on it/them and selecting 'Send To | Compressed (zipped) Folder'.
