#1 The natural evolution of the game
It is not surprising that the game is moving slowly towards a more attacking approach, with more and more teams opting for managers that bring in an offensive brand of football. At the time Klopp started at the Kop, his Gegenpressing was considered too taxing to be followed, and we all know how that worked in the CL last year.
Most Premier League teams are transitioning away from the defensive style - "Brexit football" as championed now only by Burnley's Sean Dyche and Manchester United's Jose Mourinho, now that Chelsea have freed themselves from Antonio Conte's defensive prowess.
Guardiola and Klopp represent modern attacking football at its finest, an almost obsessive desire to hold the ball and make things happen, not even stopping when you are 3 or 4 goals ahead. While Klopp's style is definitely heavier than Pep's fluidic approach, with the right players it is just as beautiful to watch.
Now with most teams going for the pressing, Liverpool have the advantage in that they are already used to the system. They are 2 years ahead of the rest when it comes to this approach, and it shows every time they close down their opponents before they can make the first pass.
Jurgen Klopp's system has been in development for quite some time now, a time with a lot of highlight reels and not any in the way of trophies. What could be a better statement of purpose than winning the Premier League? Liverpool are in it for real this time.