Actually, it's not. Hazard is a crucial player to the squad as is Oscar. You say hazard is irreplaceable, but oscar isn't. However, chelsea looks a lot different when oscar doesn't play. You can see the huge difference, however, it could be due to the fact its always Mikel coming in to replace him... Obviously, Oscar needs to improve, however, Oscar to me sacrifices a lot for the team the same way he sacrificed himself a lot so Neymar could benefit from it... Oscar doesn't have the dribbling ability that either willian and hazard possesses, which is why a ton of people keep saying he can't play big games, however, by that thinking, Cesc should be replaced as well for ramires.