I feel like this was always destined to happen.
With the advent of detailed statistics and technology, we were always going to find the optimal way in which football is supposed to be played, Pep or no Pep, and I guess this current way of playing football is simply how the game is meant to be played for the highest possible efficiency, within the current rule system at least.
We might see some slight changes and tweaks in the future, but people who think we're ever going back to more chaotic and exciting style of football are just coping hard.
Even if someone finds a better tactic to play football, it's going to be instantly copied by everyone else and there's not going to be a variation of different styles either.
It's similar to how military history unfolded. You had chaotic warfare and totally different types of armies clashing until at some point military tacticians just figured our the optimal tactics, passed this knowledge to one another, and you get all the armies fighting in the same way for long periods of history until new technology comes up.
With football however, there's not going to be any disruptive element so we're just doomed to what we have now. You might as well enjoy it or pick another sport.
Unless there is some crazy rule change like for example giving teams a limit on how long they can keep the ball or limiting the number of passes before shooting at goal, we're just doomed to see the current "Pep influence style" in slight different variations being on display forever.
For example one way to make football more exciting would be to introduce a rule that you're only allowed to have 8 passes on opponent's half and then you have to shoot, which would force teams to play more long balls, dribble more or attempt crazy long shots. But I doubt people will be ready to accept such radical rule changes.