Agree with all of that.
I do wonder, considering it's been so obvious how to beat Liverpool for a while now, why we didn't do this last year when even poor teams were. I can only assume at the top level it is seen to not be best practice to chop and change strategies unless the core strategy is truly baked in. Kind of like how Southgate was saying he intended to start trying different formations once we had qualified rather than risking it in a match that means something.
Poch must have always known this would be how to beat Liverpool, and how to compete in Europe. I guess we've seen with Mourinho, they've been in good scoring form, park the bus against Liverpool, and then lose all semblance of fluency against Huddersfield. We may have lost against Liverpool at Anfield last year, but broadly we kept our fluency for the rest of the season. Now, that fluency is second nature, we can be more creative.