Dude, what is your point with VVD. He's fit enough to play the vast majority of games for Liverpool and his NT. Hummels missed two games for Dortmund and had to pass on every single international invite. His knee problems are a constant topic, he's probably only playing with painkillers. And the whole issue is that it's not just one players, who is having issues. So trying to turn this into a VVD vs Hummels fitness debate is even more asinine. Hummels isn't even the biggest issue for Rose, because he's still performing on a relatively good level.
You mention tactical cohesion, but not getting a good pre-season with your team and not being able to form a cohesive first XI, because you're constantly missing players is quite obviously a direct obstacle for that. Not to mention that Klopp himself once nosedived all the way down to the bottom fo the table, when faced with a tournament hangover and injuries after the 2014 WC.
That doesn't buy Rose a complete pass, but it illustrates that part of the problem goes beyond tactics.