I don't buy the hype, but the guy is a monstor wrestler, which is just a fact, he demolished Ryan Bader and Phil Davis in college. His take downs and front head control are amazing and he has shown great BJJ knowledge. That is the formula to beat Silva.
On paper, Weidman seems to have the best chance to beat Anderson. But I dont think he will. His wrestling might be good but not yet at Sonnen's level and as of now, Anderson TDD is able to stuff some of Sonnen's TD. He will also be able to keep Weidman standing and you know given Anderson striking skills, he will own anyone currently in the division.
Back to the topic, Should Rashad move down, he will be top 5 MW no doubt about it. Many interesting match up with likes of Vitor, Bisping and many more. But unless Anderson retire (which won't be anytime soon), he will be number 2 MW at best.