I think he would be good work rate.
The issue with Isco is he is behind Ronaldo, James and Bale. This does not necessarily change with a new manager and Bentiez going due to a draw on Sunday reflects badly if Madrid would have sold Isco if they had won that game but not if they drew. They either see him as surplus to requirements or not in my view.
This is not to say it would not have an affect if a new manager comes in, he may well want to wait to the summer before selling anyone to give himself time to assess. However Isco may have already made his mind up he wants us especially if Pep is coming so negioations could well be continuing in regards a summer move (this never felt like a January deal anyway, just City getting a headstart on other teams).
One thing we know about Madrid is they love shiny new toys and nothing excites there fans like creative mids/ strikers. It would be expected they would well go into the market for a new player in the summer as well, especially with a new manager and a possibly trophyless season.