I don't agree with your changes, but we definitely should go 343. We should have dropped just Dier into a back five as soon as we saw the team sheet.I'd change it to a 343 for second half and match up. Take off Aurier and bring on Ndombele or Winks in the middle, move Sissoko to right wingback. Then I'd take off Lucas for Lo Celso and move Dele into the front 3 with Son and Kane. Dele and Son are making the same runs in the same space, Lucas is in no man's land and there is no defensive shape.
If we match up at the back they don't have midfield runners that will get in behind the back line and we can keep a relatively high line
Crying out for a give and go, ball demanding/controlling CMBeat stick is coming out for Mourinho. Disgraceful. Granted not the best games in both against United and today first 45mins, the players are just doing him a great disservice with such half-hearted performance.
I'm fine with Sissoko but other than that I completely agree with you. Dier is a medium talent that maxed out his ability around 3 years ago. Why he continues to play is a question only Mourinho and his massive ego can answer.Winks, Ndombele, Lo Celso and Eriksen on the bench and we are playing with three midfielders that cant control the ball.