On the Go makes perfect sense. That's what bothered me most about COD before, you made the slightest move on your stick and your character would stop reloading. Dumb. Why wouldn't you be able to reload while running? And, btw, running in COD looks more like walking fast.
Only when people use both Lightweight and Extreme Conditioning do we see crazy speeds. But, most of the time, running in COD looks like walking fast. So, On the Go makes sense to me. With all the other perks that will create OP situations in Ghosts, On the Go is the least of my worries.