The worst bug apparently is limited to importing characters from original Dungeon Siege 2. Many (truly) folks, including me, can't even play the game because there is a limit to the number of characters, and this bug prevents you from switching characters in your group. For example, I tried to play a multiplayer party mode in which the limit was 3 characters. One early quest requires you to make a dwarf a member of your group. When you need to get your original party members back, the only way to do that is to release this dwarf to the Inn. When you do that, the game quits and when you start again, that character is gone from the game. There are many other problems related to this bug. This happened with both of my imported DS2 characters.
I would normally expect a patch to resolve this problem from the developers, but apparently the thinking is that this won't happen unless you import corrupted save files. My understanding is that they have not been able to figure out how these files get corrupted, even though they have been trying a long time. So I will be pleasantly surprised if they do find a way to fix this problem, but I'm not holding my breath.
In my opinion, the quality of Dungeon Siege 1 and Legends of Aranna was much better than anything after that, and Broken World is aptly named.