What about keeping young and Jones?
I'd let them go personally. Jones seemed to be locked to a contract was that before ole? In any case we could still try to sell and would be surprised if we didn't entertain a legitimate offer. If nobody comes to buy there's not much we can do seeing as he signed a big deal recently. Young of course could go this summer, though it's not catastrophic if he doesn't. There's a clear exit plan for him. Being lumbered with players the manager has no plans to use or would rather not have to force into a line up is a bigger issue than one you can define a role for with a clear plan.
If I was in charge for example I would be actively looking to sell
Rojo
Darmian
Jones
For the sake of argument let's say one of 2 strikers don't suit oles plan for this example let's pretend he's open to offers for
Lukaku
He knows the following is going
Valencia
And we may be resigned to losing a player we don't want to eg
Herrera/pogba
So let's say 6 Senior players leave this summer. And they are replaced with 4 good signings of a good profile eg rice sancho felix Alderweireld. And 2 youth players expected to be more involved greenwood tuanzebe.
That is a huge overhaul in one window.
Fast forward 1 summer and we know mata and young are gone. Hopefully sanchez too at some point in next 12 months.
If in 12 months he removes and replaces 9 or 10 first team players that's huge work. Brilliant work if the replacements are right.
I feel that as fans we can make a strong case for almost every player leaving, so every player that stays can be used as evidence of solskjaers weakness or lack of action. It's a weak argument I think and a squad overhaul like I describe is realistic and very proactive