Completely agree.
He demonstrated a very high level of technical quality in the game by resisting the Liverpool high pressure from midfield. We had a extra midfielder centrally today due to having Mainoo, Amrabat and Dalot as midfield options, and that made a difference imo. Dalot imo is among our best players at resisting pressure from midfield.
The system wasn't different today, but rather what was different, was that the personnel we had playing today gave us a identify from back to front due to doing the bare minimum out of possession and also having the attributes in possession to make a difference, which caused Liverpool problems due to the extra composure on offer compared to last season's drubbing. Mainoo occupied Bruno's role, but played the role differently due to being a more natural midfield player. Mainoo starts low and goes high, and Bruno starts high and comes low into midfield. Mainoo starting low and going high meant Dalot inverted into midfield, and that gave us a solid central base in a low/mid-block setup, which Liverpool found very difficult to breach.
We could've still lost the game and on another day could've even nicked a result due to the chances that fell our way. But to build/develop a team requires all the players to do the bare minimum for the team. And if you have that commitment, then you will build strong foundations to add to.