Honestly, the only one of those I really care about is the composer.
I know some folks were a concerned about what the gameplay demo showed, but I am honestly not that worried based on it being more action oriented. They probably just wanted to show off more of the engine and really, action is the best way to do so. I also like that they added in Instinct mode. It makes sense for 47 and it's much better than having to switch back and forth between the map.