Ashes was very progressive sounding, I'm glad they combined their older styles with that on their new album because it sounds really unique.
As for the vocals, I hate it when people hate on growling just because it doesnt sound clean. Clean vocals wouldn't totally kill this album, but it would take away heavily from the mood the band was going for. I mean listen to that haunting screaming in the middle of Black Lake Nidstang, if it was sung in a clean voice then that part wouldn't even stand out or have any emotion in it. Clean vocals in dark atmospheric music just don't make sense.