There is not a new tactical approach at all.
I swear to fuck some people don't actually watch us.
When we play, our midfield does the job of 4, sometimes even 5, players, it does this by covering ground so effectively & managing intensive & rigorously practiced routines.
Remove Henderson from the equation, add in the fact his closest substitute player, in, Milner, being unavailable, & then factor in a massively out of form just returning Fabinho, & you have an entire side that is completely our of shape, with the centre backs forced to push high, not all the time, or more than usual, but at different times than usual, the forwards dropping back more than usual, & the full backs either unable to push on as much, or being massively exposed when they do as the cover they normally get from the midfield isn't there.
That's it. That's why VVD looks more exposed & has more to do, that's why passes are going astray when passing from the back, that's why the attack isn't as sharp, & that's why the full backs are less effective.
It's not simply a coincidence that our midfield has suffered these issues at the exact same time our form has dropped, & it isn't down to any new tactic.
Without trying to hammer this into place too much, we are a machine. Not some creative masterclass where players simply turn up & blow teams away (not that they don't have their own individual moments). We grind teams into the ground & 90% of what we do is pre drilled. I'd go as far as to say that the majority of our play is dependent on the midfield being exactly where they should be & pressing when & where they should. Changing that is like replacing the cogs in the middle of a machine with some that have different gaps between the the teeth, everything else just stops working effectively.
This shouldn't need to be explained, it's been evident in our play for two fucking years.