I really liked this episode, and especially Krell. Krell is like a typical second lieutenant type (I know, I know he is a general, but it seems to me, that Jedi act more like lieutenants, while cody and rex are more like sergeants). He is just like those pricks in army, who have just graduated from academy and all they can think of is protocol, discipline, and orders.
The way Krell addressed the clones by their numbers, was exactly what a guy like him would do. And i really hope that Krell will remain the way he is. We've got enough good guys in Clone Wars!