I backed this on KS, but I'm finally, just now finishing it. I had two abandoned coop games because my coop partner and I couldn't coordinate our play time and once when my partner just decided she didn't want to play anymore. I just never felt like continuing on my own.
Finally, things came together and I was able to get a friend to play. Sometimes we had conflicting schedules and had to take long breaks, so our memory of some past events may be a bit fuzzy. We finally reached the end last night, but were both a bit confused by some of the events.
After the weird dream sequence, when we make it out and find Zandalor and Icara asleep, Zandalor wakes up and talks to us. He cautions us about forging the two sisters because he doesn't think Icara can control Leandra. We assumed that after the battle with Leandra that we would have to make the decision to forge the sisters or kill Leandra, but after the fight was over it just forged them and never gave us the chance to make a decision.
We continued on, and then after dealing with the death knights before reaching the void dragon, the soul-forged sisters stop following us once we reach the bottom of the stairs where the vendor guy is. We thought it might have been a bug, because when we stopped and traded with the vendor, while I was trading with him, my friend wandered off too far and triggered an autosave. We loaded a save after killing the death knights and walked past the vendor, but she stops in the same place.
We continue on without her and fight the void dragon. After the battle with the void dragon, Icara appears and begins talking to Zandalor and it sounded as if she was saying Zandalor killed Leandra. We were both confused as to what that was about. Is that encounter bugged or is it supposed to be like this?
After that, a cut scene rolls and we assumed it was over, but then found ourselves in a new location. It was late and we both had to go to bed. We saved there and quit, so we haven't actually finished yet.