I know he'd lose money if he walked, but it might save his reputation if he openly acknowledged he'd made mistakes that he couldn't rectify. I'm sure there's a mutual consent option somewhere in all this too. But if Moshiri is hoping he'll walk to save money, he should consider how much the club will lose through relegation.
On the Barkley issue, while I've supported Koeman's treatment of him in the past, that is no longer mitigated by decent results on the pitch. I do think he would stay if Koeman left, but I think it will take a very particular kind of manager to get the best out of him, and to handle what, to my mind, is a hugely talented, fragile, and not very bright little boy. I reckon Unsworth would be that manager. He's empathic, shrewd, tough, flexible, and clever. For me, that's just another reason to appoint him.