This is where a takeover like the Mags one during mid-seasom can cause difficulties.
95% of that squad know that they will be replaced and out the door at the earliest possible opportunity. And the manager won't be too far behind.
You will definitely get a few players, some of whom the Mags will need to persist with until at least the summer, who realise this and will mail it in thinking sod that.
I'm sure some will say "it's the same at any club" and "players will always want to do their best to prove to themselves blah blah blah", but that's not comparing like-with-like.