I don't think you understand the word pragmatism.
Pragmatism is approaching things in a success driven way. Which is exactly what Guardiola does and has done his entire career. He plays the way that is most successful.
The Liverpool games were just a flashback to last season when half a dozen sides did the same thing to us. What was the answer, switching to a 442 big man small man, 10 men behind the ball? No, it was just being better.
You keep improving in the style and system that has broken dozens of records this season, and you run circles around Liverpool, just like we went from being gangbanged by Spurs' high intensity press last season to outplaying them home and away this year.