Mourinho has gone from Terry, Carvalho & Makelele in their prime to Luiz, Cahill & Mikel. That is a big downgrade in their defensive spine imo, Gallas who was a world class CB at the time couldn't get a game in the middle for them! I'm surprised he didn't bring in another CB and DM tbh. Mikel seems to be stuck at his current level for years and Cahill has looked suspect since the day he joined, looks great when they park the bus and he needs to put in last ditch blocks etc but he seems bamboozled at the sight of clever movement from a striker in normal play. I remember my mate laughing we signed Per instead of him but fuck me he would of looked like a pub defender for us considering how bad we have been defensively at times.
I suppose if anyone can get them playing better defensively it is him so he must have faith in them. Early days still and they will improve unfortunately, too cosy with the media at the moment. They are licking his arse but I think he is the type of guy who needs to be hated and his team to be hated to work up a siege mentality in his squad.