An extension with Maguire is completely outrageous. A separation would be much better for both parties. I think Maguire could also play a good role at Leicester again, for example.
At United, similar to Arsenal or now at Chelsea, the only thing that helps is to regroup with a core of reasonably young and, above all, fairly fresh faces and slowly crawl back up again with lowered expectations.
But that’s only possible without faces like Maguire. In this case, this is less due to his personality or his current achievements, but more to the stigma that now attaches to him and his presence at United.