Italy has been by far the most consistent and impressive team, but they haven't faced any particularly tough tests yet, and they played at home. Still, all the other big sides have underperformed in at least one of their matches, and the managers of the favored sides have all come under scrutiny for their chosen lineups and tactics. The rubber really meets the road in the knockout stages.
Southgate really does get so little out of such an abundance of attacking talent. He needs to play someone who can actually get the ball to Kane in the area, like Sancho and Grealish. Sterling and Foden not getting it done.
Portugal is in for similar criticism, especially after losing so heavily to Germany. Ronaldo is a wonder out there on the pitch doing what he does at his age, but he's a black hole offensively, and the other attackers are starving for oxygen. They play so much more fluidly without him, but you can't drop him — such a catch-22.