The problem is that Dooku is just quickly killed off five minutes into ROTS; so what was the point of having him in AOTC the first place, establishing him as the main antagonist toward the end, and then throwing him right away in the next film? And then they add General Grevious in ROTS for no reason at all. It should have been Dooku instead of Grevious, that would have made it much more satisfying story arc.
Plus, why did Lucas even choose Hayden?? Anakin was supposed to be the lynchpin of the PT and they screwed it up by an irresponsible casting choice.