It's also a question of quality. There's no one in that team who could tie the laces of Lloris, Jan, Toby, Walker, Eriksen, Son, Kane, young Dele. Just on the simple basis of individual ability irrespective of playstyle.
Sanchez will never be the shotstopper Lloris was. No matter how shit the tactics were you could usually rely on Lloris to pull out some wonder saves, and Kane/Eriksen to score, even just scoring a banger from range.
There's none of that at the Chavs right now. Sterling is the closest but he's just not going to carry a team on his back like Kane did.
Then the question has to be, did Poch just luck out with us?
I actually think part of his problem is that he himself doesn’t really want to be at Chelsea, you can see it in press conferences, he has no passion for it. He wanted to be back at Spurs. What he should have done was go to some mid table Spanish team and reinvent himself. Going to that shithole was a big mistake, which he’ll find out with the sack at some point this season.