I pretty much agree with what Hebbe said. The structures of the songs are great, and together with the guitar playing (to what extent I'm qualified to judge that...) they are what have improved the most I'd say. And bear in mind that I loved the songs of your last demo. Some of the melodies are awesome, and I have to admit that I Havsråets Famn gives me goosebumps.
As for the keyboards and mouth harps; Very well done. "Better in place", as Hebbe said.
My only gripe is the growling. Think I said this before when you sent some sample - it seems to me like they are sung too deep down in the throat, and at times it makes the words melds together to "growgrowgrowgrow".
I should though mention that while I at first didn't like the Irminsul's growling, it grew on me after a while, so maybe the same will happen with your's too.
Anyway, I really like your clean vocals and would love to hear them get a more predominant role. Also I love Marie's vocals, and I hope you'll get her to sing on future releases too.
After a few listenings favourite tracks are När Solen Slocknar and I Havsråets Famn. Will see what other things I can say after having listened through it a few more times. But to sum up the first impression: Great songs, the melodies, playing, structuring etc. Some improvement on the growling side (and maybe a little more clean vocals) and it'd be perfect.