Totally agree with this. Can't stand the obsession with 'Plan Bs'.
If you want pragmatism, if you want it all to simply be about winning the next game by any means necessary, go and watch whatever club Sherwood ends up at. Because that's what it has been for the last 6 months. Unstructured, uncoordinated.
Some teams may well figure out how to play against the Poch system, but it doesn't matter too much. Michael Laudrup gave an interview once where he broke down the perfect tactical way to beat Barca, based on the weaknesses their system exposes, but he said knowing it is one thing and actually being able to achieve it in a march situation is another. Do people not think clubs will have known how Southampton play towards the end of this season? It will have been pretty clear.
If we are well drilled enough in our system, not too many teams will be able to conquer it. I'm sure it's possible to alter the formation but the principle's should remain the same. A Brendan Rodgers quote I actually like is 'Plan B is to do Plan A better'. The whole point is that the system provides advantages, so you work at it. If the team was going to adjust what they were doing game to game or even within game we are back to the Sherwood days and may as well have kept him.