We looked a mess at the back even against Chelsea in the league we didn't look that disorganized at the back.
Possibly like you said moving Romero to the RCB and Sanchez making way.( Harsh on Sanchez who has been decent recently but it's football)
Likewise could blame the midfield and the LWB who both become enonomous in the build up to the 2nd n 3rd goal
I mean come on.
The goals were down to poor defending pure and simple.
Better midfield protection of course but the charity levels were offensive.