Never have I seen this laid out before like this, and so I thank you for that! I think it's a real tragedy that we can't just have a rational Visa system- you get an offer from a company, then you should be able to get a work visa. Work visas continue for as long as you are employed plus one year. That gives you a year to get a new job.
This is how you attract the best and the brightest and this is what america needs.