I have enjoyed the Anakin Evolution set. I too am probably going to pass on the Sith Evolution set because I don't think $20 is worth it for just one figure I really like, Sidious/Palp. Darth Maul is not a major improvement, not major enough to justify the cost. Dooko, I agree, is not a major improvement over the ROTS. So bottom line, I'll be leaving one in the isle for someone else.
Now on the clone one, that is a different story! I cannot wait for that to show up!