Is there a way for an individual player to roll back the update so we can confirm the issues is due to the update or not, while using the same save? Or is the update built into the savegame now and it's impossible to separate the two?
I don't think there is any way to roll back updates. If there was, an earlier version of the game would be able to load saves made in the previous game version, but not any made since the last update.
I’m playing with cross save enabled, and a number of the larian mods turned on. I have a solo build. Haven’t yet been able to complete the battle in blackpits. It always crashes before I’m able to finish the battle.
Please email supportdos2@larian.com with your save(s) in or before that battle (whatever saves are the most reliable for crashing), or a Dropbox or Google drive link, etc.
Once synced to PC, each save is a folder in the '..\Documents\Larian Studios\Divinity Original Sin 2 Definitive Edition\PlayerProfiles<ProfileName>\Savegames\Story' folder.
In Windows Explorer you can zip a file or folder by right clicking on it/them and selecting 'Send To | Compressed (zipped) Folder' (and similarly in OSX/Finder).
Currently we only have one situation where the crashes can sometimes be reproduced, so additional saves where we can reproduce this will speed up testing of a workaround, and help confirm the cause of the crashes.
