nah, Sith should use the "warm" side of the light spectrum: yellow, orange and red - Jedi the "cool" one: blue, green and maybe white ...
Anakin as Vader should have used a red blade.
Yoda, if he is to be in the prequels, must be the master who doesn't use a lightsaber and isn't "superfrog" - only his defensive style is needed to show his superior skills!
hm, Dooku is complicated, it depends what one wants to do with the character, so he is very open for all things ...
Palpatine's fight with Windu wasn't all that bad - it was the silly jumping around, like Yoda, that ruined his style ;-P