I'd like to echo the previous poster.
There's a reason they call them feeder schools. The regional pull of UH will trump anything you can get from Wash U, and even Georgetown. I'm at a comparable school to Wash U, and find that even though we're the top program in our region, the other local schools place almost as well at the area firms. UH will be competitive with UT-Austin because most firms are looking for diversity in educational experiences.
Also, Wash U will likely drop in peer rankings (one component of USNWR rankings) because of the loss of Lee Epstein to Northwestern. She was a huge star for them, and considered by many as the top empirical law professor out there. WUSTL also seems to be hurting for high-range LSAT candidates this year (a friend of mine with a high 160 got in off the waitlist AND was offered a scholarship), which might also impact next year's USNWR Rankings depending on how similar schools do in recruting candidates.
It is debatable as to whether these factors will affect their overall ranking (because that also depends on what BU, GW, and UMN do). It's a great school, but if you're eyeing it because ranking is important, I think your money is better spent elsewhere.