Jesper was supposedly "involved" in the last album and most of it was boring as fuck. At best his involvement will be limited to a few riffs here and there. To have that real Jesper magic he needs to be involved in music arrangement too, and I doubt he is. His primary focus seems to be on THE now, which is fine by me.
As far as the clip is concerned, it sounded fine but anybody who is half decent at playing the guitar can come up with some melodic guitar riffs. Some of the NHIH stuff sounded good in clips, but the songs themselves mostly sucked. Cyhra 3 might be good, but the band would need to have a serious rethink about what went wrong with NHIH, and I'm not convinced that's happened. They probably think it was fine.
I'll listen to the album when it comes out, but my expectations are as low as they were for In Flames around the SC/Battles period. I expected big things from NHIH and it was a massive let down, so they'll have to do a hell of a job on this album to bring me back as a fan.