Somebody needs to get this awesome finnish electro/crabcore/post-hardcore/whatever band on Rock Band. I would contact them myself but I don't have enough knowledge about how everything works to do that.
Just listen to their newest single off their upcoming album. It would be fantastic in Rock Band, just like any other song of theirs. They are also on Spinefarm Records, just like Amberian Dawn so their label shouldn't be a massive problem (hopefully)