He would only be, what, the second skier to win a World Cup without a national team's support, another milestone. Though you could argue that Janica Kostelic's "national" team consisted basically of her family. Still, I'd hate to see the conclusion drawn that Miller won (if he wins) the Cup because he left the team. First, even in his "worst" seasons, he was still a Cup contender. And second, not to take anything away from any of the top contenders right now, but if Svindal doesn't take that fall we might be looking at a very different season.
I wouldn't want younger skiers to all of a sudden think leaving the USST (or any nat'l team) is the best way to go. Bode, Ghiradelli and Kostelic are/were exceptional cases, exceptional talents.