I think the players who stay/leave or join us over the summer will depend on the factors already mentioned but also who will be the head coach/manager and what will be the style of play.
For example, whilst Dawson has been a good player for us, that was mostly whilst playing Pulisball.
He's not a ball playing defender or a wingback, so it may be judicious to move him on and get a good fee for him if we're going down the route of appointing a coach whose teams play out from the back and want pace and quality down the flanks

We'll need a defensive midfielder who can pass the ball accurately to more forward players. Yacob is great at what he does but it's pretty basic and restricted plus he's slow which in a fast moving game like the Chump might mean he'd be found wanting.

Brunt and Morrison I'd keep. They're professionals and have been there and done it before.
Somebody will buy Rondon for 8m. Chadli will pout until he gets his move. Evans has already left in spirit.

I'd try and offload HRK. He just isn't quality. He didn't rip up any trees for Reading, so is unlikely to do so for us.
Will JRod accept playing in the second tier and get on with it or will he sulk?

We need to get rid of Philipps and Livermore. Neither seems to consistently play well.
Keep Burke, Leko and Gibbs if he'll stay.

Them's my onions. I'd love it if we appointed a modern thinking coach who combined flair and steel to make us attractive to watch and difficult to beat. That will take a while to achieve which is why we need a young hungry manager with modern ideas and give him time. If it takes a few years I'm up for it.