Answer should be yes and no
The business he did do he done very well
Its the business he didn't do that's the major issue
Indeed, but take Oumar Niasse for example - sitting there on massive wages, content not to leave, the legacy of failure before Brands arrives. That's a very hard barrier to overcome when trying to reshape the squad.
Ideally, Tosun and Niasse wouldn't be here and someone like Haller would be, but if those players refuse to move then they have contracts - there's not much we can do.