Actully I do think that Dooku would be relatively "kinder" than palpy in certain things. Yes he might actually make a better emperor. Then again it is also easier replacing him with one of the darksiders, as his grip of the Empire might not be as tight and far.
Remember his bulk of troops would be Droids, and we know how they fare in battle. Sure they are easily replaced, but still maintinance is more than some lazy sandtroopers.