If the US wants to improve in the Mosconi format is to play the event style matches like the Euros did before the event. Whether it be exhibition or money challenge an Asian team, or another group of US players (For example a team of Oscar, Chris R, Lukas, JB, Mike D), this would at least let them work on the shorter races and show who may actually be a good pick for the next team. Arguing that JB or Lukas should be picked wont really make a difference without them actually learning teamwork and excelling at the format. Its like switching someone that barely makes top 64 or 32 in a WNT event with someone that barely makes top 64 or 32 in the same event. Everyone on the Euro team is a champion of said events. In the short timeframe if you cant get better than them in skill, get better than them in the teamwork and that should help them feel less pressure and make the match closer.
The whole argument saying "well this US player would be that Euro player in a race to 1000" is irrelevant. All that means is that you are saying I need more games where I can dog balls and recover and grind out the other guy. The fact is in a race to 5, the Euros maybe make like 1-2 mistakes the entire time. The US players are lucky if they only make 5.