The player behind the striker is expected to be the creative force in the team, but that's not Oscar's game. He can make a good pass, but like once every 6 games. It's not good enough for a #10, but he fits the hardworking approach under Mou, and scores goals to make up for his lack of assists, so it's all good for now. I won't be surprised if he's left out for Willian more though, assuming Salah settles in well - and turns out to be the left-footed pacewhore Mourinho wants.