Well, I'm ready to throw out my two cents worth of diatribe.
Belgium was so ready for this game. I think the whole red card thing galvanized them to the point where they came out ready to destroy any team they played. The US meanwhile came out like they were so stiff worrying about now having to prove they could hang with a team like Belgium they couldn't relax and just play. Belgium played like they had something to prove.
By far the play of the US was horrendous. Poor passing, poor decisions, way too slow on the ball. Lack of movement off the ball. Ball watching in the back when they should have been marking. Too easily beaten off the dribble by Belgium. They allowed Belgium to out muscle them, out physical them for 90 minutes.
The players who needed to step up the most failed, period. Pulisic, Dest, Ream, Freese, Freeman. Balogun is a speed guy and Belgium just kept muscling him which he cannot stand up to. He needs space and Belgium shutdown that space which made him ineffective.
Pulisic had 14 lost possessions in just 59 minutes. That is awful. Pulisic just can't be depended on, way too fragile. Belgium took full advantage of Ream. The US couldn't connect passes and passing accuracy was awful. Way too many unforced turnovers. Watching the game you soon realized the US lacks high level skills. This points to a huge problem with the USSF program as a while. It's quite apparent skills are not getting enough attention at the lower levels of the program.
Tillman played well. Berhalter tried to get some enthusiasm going once he came on. Reyna was pretty much just there. Pepi ran around a lot but did nothing.
So looking ahead, First they need to have Pochettino on for an entire cycle. He needs to have a lot of autonomy on the program. There should be a lot of new faces brought in to look at over these next four years. GK and defense are in dire need of upgrades. A finisher needs to be found to pair with Balogun. Most importantly they need to find a playmaker to create. I don't think they need to find a Messi but they need to find someone who can both create with passes and someone who can also finish chances. A duo threat player. We don't have that. Every top team has one.