Ok, so a bit hard to determine what you're saying there (the "will or they should" statement).
So here's my take on that list
Meslier – stay – Will leave
Robles – Stay – Might leave (depends on the way the last here games pan out and his performance)
Rasmus – go – Will leave
Firpo – go – Will leave
Ayling – stay – Will stay (Not attractive to any other Championship side and wouldn’t want to drop to League 1)
Koch – Go – Will leave
Cooper – go – Will stay (Ditto Ayling)
Llorente – go – Will leave
Cresswell – stay – Will leave
Wober – stay – Will leave
Struijk – stay – Will leave
Drameh – stay – Will leave
Hjelde – stay – Will leave
Shackleton – Stay – Will leave
Adams – go – Will leave
Aaronson – go _ Will leave
Foreshaw – go – Will stay (Ditto Ayling))
Gyabi – stay – Will leave
Bate – stay – Will leave
Poveda – stay – Will leave
Roberts – go – Will leave
Sinisterra – go – Will leave
Harrison – go – Will leave
James – stay – Will leave
Costa – go – Will leave
Gnonto – stay – Will leave
Gray – stay – Will leave
Bambi – go – Will stay (despite what I said in another post, but only because he will be another “Ayling”)
Rodrigo – go – Will leave
Matteo Joseph – stay (Who?)
Joffy – stay – Will leave
Perkins – stay – Will leave
Bogusz – go – On his way already
The "Will leave" category is a mix of those who want away (Meslier, Harrison, Gelhardt, Perkins, Cresswell, Gyabi, Gray Poveda, etc), those the club will want to dispose of (Llorente, Aaronsson, Firpo, Roberts, Costa), and a few who could fall into either camp, but will not be here next season (IMHO), (Kristensen, Koch, Struijk).
There are a couple you haven't mentioned;
Rutter - Not sure why we would keep him, but equally unsure as to who would want him (another example of our dear departed DoFs skill at talent finding)
McKennie - I presume he will go back from whence he came?
And no, I'm not trying to be overly pessimistic, but frankly I can't see any of those I'm suggesting who will want to leave being persuaded to stay (on a 50% wage cut, as rumoured), and the club won't want to keep some of the dross that was acquired over the last two windows (and won't have the revenues to do so, despite parachute payments).