The thing with a new manager which makes this sorts of predictions hard is that some players always improve while others don't fit and actually degrade. Silva has in his previous jobs turned around several players thought to be basically shite. So who knows which ones in the current squad turn out decent?
With one CB gone and another being sold if someone takes him it's clear that's one position that will be strenghtened. LB is another and if a left winger is brought in I think there's decent strength in depth.
For me the most interesting thing to see is which of the youngsters are deemed good enough. There are so many potential young players in the squad that they can't all possibly get enough time. Some will be loaned obviously.