Not sure he has the same work rate and aggression that Costa brings so not sure he'd suit Jose's Chelsea more but I think he's better than a lot of people give him credit for. He scored a fair few goals last season despite being out of position.
To many people judge players on the odd game they watch on TV. It wasn't long ago many arm chair fans didn't rate Ibrahimovic due to a few average performances in the C.L, where as now he is seen as a top 10 player in the world, if not top 5.