Larian released a change log the same day as DOS1's enhanced edition was released (Link) so I assume they'll do something similar for the release of the definitive edition. Until then I imagine we'll mostly hear about the general improvements and changes rather than the specific details.

Originally Posted by Tuco

it feels like a misguided effort, since they are either being dodgy about listing some features or literally ignoring some of the most heavily criticized aspects of the vanilla game (soulless itemization, poor initiative system, questionable armor system, insane stat inflation, weak/unexciting perks, etc).

I would take improvements in any of these areas above an additional questline with a squirrel, frankly.

I agree, but I think I'll wait and see before I pass judgement. They're likely too far into the development of the definitive edition to make any major changes anyway.