To me, Valby races like a middle-schooler who does things more by impulse than strategy. The poor girl has trouble finding lane one on the track for crying out loud. Before anyone jumps down my neck, my gut feeling is that her upside is absolutely massive...like once she starts figuring some things out, poor-Katelyn-will-be-left-in-the-dust-level-talent here.
As an analogy, up until recently, the world's most famous rock climber was Chris Sharma. When he was only 16 in the 1990s, he climbed the hardest rock climb in America. I saw him climb in a comp back then, and couldn't believe how poor he was at finding the route or using his feet. The thing was, he was so much stronger than everyone else, it didn't matter, he still beat them. It occurred to me then that if/when he improved his technical game, he would be not just the world's best, but utterly dominant. Flash forward 10 years, and that was the case.
Valby could be the Chris Sharma for U.S. women's running. The caveat is I'm not sure that Solinsky is fully up to the task of managing such a talent in the long term. I will give him credit for keeping her healthy and happy though, which is 90+% of the game.