I think at the moment he's scared, which actually surprises me a bit. He's always come across as pretty bullish, so I'm shocked he's not doubling down with (whatever is) his philosphy.
But, for all those calling on him to just get on with the modern football already - think back to the first few matches this season, when we simply didn't put out a midfield. That was the formation for his masterplan: a 4131 essentially. But the defenders couldn't handle it, Casemiro couldn't handle it and the wide-forwards couldn't handle it.
I really think what he had in mind was a midfield upside down triangle, leveraging Mount's energy to do the running so Bruno could be the creative spark, and Casemiro would sit and do defensive things. But the latter just can't do it, which has totally ruined ETH's masterplan. Couple that with not having a LB worth the title to provide both defensive recovery speed and overlapping runs offensively, and it broke him. Further, doing that required a much higher defensive line, far more like City and Liverpool. Which is something you sipmly cannot do with Maguire, Evans or Lindelof. All of whom have to play, every match, because he only has 2 CBs who can make it work, and neither are typically available.
You simply cannot play the way he wants to (and we want to) with these players. With hindsight, especially given Martinez's injury, he needed to bring in a pacy, energetic centre back.