Well, probably quite a lot of changes, but most teams seem to be having a fairly big playing staff turnover most summers now, and we've done a huge amount of work in the transfer market since Jack has been here (not all of it successfully, of course, but that's not criticism.)
Long way to go yet, though. No way are we home and dry just yet.
I do, of course, believe that if the players you've outlined above happened to help us canter to the title here, then they should get their chance in the top flight, but no doubt we'd need to add quality. Saturday lunchtime will be a good indicator of the gap we would potentially need to make up. We'll see.