Klopp, wary of burning out a squad which has played more than 60 matches this season, he decided to make nine changes to his team but they took all three points to maintain the pressure on leaders Manchester City. Although before the game, I knew that Klopp was going to start the game with his second team considering the fatigues and injuries now facing the team. It was a bit risky but Klopp trusts his squad that is why fringe players like Minamino, Origi, Oxlade-Chamberlain, Elliott, Gomez and Jones have all delivered when called upon by Klopp this campaign. Also Liverpool's fantastic squad spirit is a big reason why they are still chasing the EPL and the champions league titles on a good form.
I definitely agree that Klopp way of rotating the squad is not a trouble, all of those players are almost ready for everything. Think about it this way, even the player who plays the least game, ends up playing about 5-6 games each year. So, those players are always getting some minutes, and that gets to a level where Klopp is not worried about players who are doing their best and trusted them a lot.
This is why I believe that we should be not worried about any type of squad they have because the system works with everything. Hopefully they will be a lot better next game, and then win UCL as well. Even if they win and lose the league, at least they could say they tried their best.