I agree that some kind of payoff is needed.

Sluggo might be able to add some lines at the end when Dooku is talking to Palpatine. Something along the lines of "I bring you good news, my Lord. After ordering the clones, the war has begun." It needs finessing, but something like that. This way, the audience learns that Dooku ordered the clones. But the Jedi do not (not that the original movie is any better in that regard - that subplot is such a mess).

Let's also not forget that Christopher Lee did the voice of Dooku in the Clone Wars animated movie. Some dialog might be able to be lifted from that.