I just watched the game again here and I didn't think we were as bad as people claimed.
In the cold reality of watching again dispassionately, Rafa did a good job of drilling their defensive block - whenever we worked it forwards Colback or Tiote would snap into the challenge and we'd lose the ball.
The omitted players made a huge difference - without Rose we had no attack down our left side. Mason was weak in the challenge and rarely turned forwards, as Dembele would have done. Son dallied on the ball and got caught, which Alli probably wouldn't have done. Mason broke forward into their box looking for a goal, lung busting runs BUT that is the Alli role, not the Dembele role! He was too far forwards and trying to score, when he should have been shoring up midfield.
So in the first half we got nowhere; we dominated play but were toothless, just like under AVB where we would push against their hard centre but not look like breaking through a really well drilled defence.
Meanwhile when they broke on us, Mason was too far forwards and they have players that enjoy breaking forwards (Townsend, Sissoko and Wijnaldum are good at this).
Poch addressed this at half time, removing Mason and Son, presumably telling Carroll to just sit in there and be a midfielder, don't try to break into their box. And presumably telling Onomah not to dwell on the ball like Son, and to try to create some width.
Anyway, we got a goal back and were looking much better... we didn't look knackered or angry or too bad... we looked OK... then Mitrovic got himself sent off and Saudi Sportswashing Machine had all the licence they needed to stick 9 outfield men behind the ball.
We got excited and went for the kill... Poch licked his lips and thought "I'm sick of pushing softly at this defensive block, let's swap Walker for Chadli's goal threat". Incidentally, Walker seemed to be running strong and was breaking forwards well, he didn't look injured.
Almost immediately TobyA charged down the right wing like Younes Kaboul on acid, and Sissoko pounced, a good ball, skips round Vertonghen who dived in cheaply and sold us short... Eriksen and others scampered back but Sissoko cheated and dived in the box... suddenly it is 3-1 from out of nowhere and we look amazed.
In reality the game wasn't over, we could still have got 2 goals in 10 minutes. But we pushed even further forwards, the game was entirely in their final third with Vertonghen matched versus some pacy players... like matching John Terry against Jamie Vardy, only one winner there. They broke forwards a few times and we made blocks but just didn't learn... we kept pushing everyone forwards stupidly, leaving that stupid foot race... at that point we truly were stupid... we were almost too desperate to score.
All sense went out the window.
But it was quite a different story watching coldly tonight, rather than on Sunday.