[Everything] Unsullied

I wanted the get people's opinions on the portrayal of the Unsullied in the show. Personally, I've been a bit disappointed with them so far. These soldiers are supposed to be some of the best in the world, being bred for battle from a young age. But with the exception of greyworm, the unsullied don't seem to live up to the hype that was sold to me when they were first introduced. In fact, I don't really see anything to distinguish them from any of the other mook soldiers in the show. I was hoping for some '300'-esque type of soldiers; planned formations, strict discipline, and skilled in hand-to-hand combat, but they've seemed very impotent (heh) in Meereen and at Casterley Rock so far, with their tactics seeming like a "throw-yourselves-at-them-and-see-what-happens" fighting style.

What are your thoughts on the unsullied? What would you like to see more of?