I think OS:2 has a ton of huge improvements. There were only a few notable things that I really didn't like.
1) The new armor system is ass, as was the reason I made this post.
2) Too many new status effects and emphasis on environmental manipulation. The whole battlefield just turns into an absolute mess way too quickly now. Another reason to just run an all mage party aside from the armor issue.
3) Death fog barrels. Delete all of them.