Clearly nobody knows what our best eleven is. But one of the big issues I'm seeing right now is that when we play anybody good, we're totally ineffective building from the back because we're so narrow and predictable, and we can't play the ball long because we're not quick or physical enough up front. So we have no way of making the ball stick in the final third but we have to try to attack, which often leads to cheap giveaways and chances for our opponents.
CM: Davies (maybe Sigurdsson/Klaassen)
The idea would be to put out the fastest, most physical front line we can and look to play long passes into the channels for them to chase. Even if we can't win it at the first time of asking, we might be able to pressure our opponents into a mistake which could lead to a chance or just get us into the final third (which is a huge ask right now). One box-to-box midfielder gets forward to join the attack, the other two are tasked with sweeping up everything that comes back at them (both Gana/Schneiderlin do their best work in this sort of role).
When things were going poorly in his second season at Southampton, Koeman had some success grinding out results like this (albeit with some permutation of Mane/Pelle/Tadic/Long in the front three) so it's not implausible that he would try something similar here. Our football is already hideous so it's not like it would be much of a downgrade from an aesthetic point of view. In fact, it might even be an improvement.