Kante and Jorginho were excellent. Everyone seemed well drilled in where to be and how to move. That was an incredibly dominant performance. Even when Spurs tried to tweak the formation, Chelsea found a way to get back at them. Kante has had his injury issues but if he plays like that all season they'll be right up there. I thought it would be between Chelsea and Arsenal for 4th but on this evidence Chelsea should be comfortably ahead of Arsenal still. Adding Aubameyang makes sense. He will play a similar role to Sterling, but be more of a focal point. Chelsea didn't manage to get the ball in behind very often, thanks to Spurs cutting it out, but the movement was there and Aubameyang is still very good in that situation.
The player at Arsenal isn't the one we'll see at Chelsea.