Just tried and yes, the CM Patch fixes it. The log entry Heavy Burden is gone altogether. However, I don't think I can use it (quest and questscripts) because I'm sure it will cause bugs the way I have it set up. I don't use any new items/enemies and didn't use any new quests. The moment some new quest directs me to a new boss for example, the game would most likely crash because I don't have that boss in my game files. So I either have to fix it manually (which I have no chance of doing) or just live with it. Also, after using the quests from the CM Patch, there was an active quest Hunting Fever I in chapter XI for some reason? I have been nowhere close to that.
Here is the list of what I used:
behaviour.txt (in hopes of fixing the non responsive white griffin)
all particle files
graphics10, 13 and 25
and then some small manual tweaks to various files (blueprint.txt (fixing Endijah's Wings), creatures.txt (tried to maunally do the human NPC scaling changes, had partial success), spells (weakened the sptiting spiders attack but not as much as in the CM Patch))
Also, the potion and rune stacking is in for some reason and I have no idea how I did that. No complaints though
Am I correct in thinking that I can safely use the creatures.txt (to have the scaled human NPCs) and it wouldn't cause any problems? As far as I understand, it is just creature definitions so it should't cause any issues if new creatures are defined but not spawned.
This also led me to a thought. A lite version of the patch with only bugfixes, fixed animations and general improvements and no new content (for purists as you said) would be a good option to have.
Thanks for the input.