I definitely agree that Kase will get a look on the top 6.
I also agree that Spezza shouldn't automatically be a 4th line guy. His numbers and overall play were fantastic last year and a 3rd line role makes a lot of sense to me.
4th line is almost tougher because you are playing with a bunch of plugs... 3rd line with Kerf and Bunting or Ritchie sounds pretty sweet.