Questions for anyone that has opened these up...
* Anakin - is there anything else 'new' on him besides the head/deco? I read someone say he now has ball-joint hips, but I'm not sure that is right. Does he have new hips or not?
Nope, still the same hips that were on the 2005 Evolutions version. The only new things on this one are the head (which, admittedly, is pretty good) and the green blade (which, strangely enough, is attached to the regular Anakin AOTC hilt). So, unless you're that fond of the new head or need another Droideka (the main reason I got it for myself), you can return this one without worry.
* Shaak Ti - I know she has new arms... but the RotS one is good enough for me. Something about her deco (the eyes maybe) just makes me prefer the RotS one. Can anyone confirm if her legs are the same as the RotS or did she get a leg upgrade to go with her elbow upgrade?
Nope, the legs on this one are the same as the ROTS version. I like the dress on the ROTS one much better, too, due to the previously mentioned "frayed" material on this version. Other than some paint differences and the elbow articulation being changed, it uses the ROTS body from top to bottom. The Geonosian in the set, however, is a lighter green repaint of the 2009 version, so it takes the sting out of the lack of new ankle articulation on Shaak Ti.
-The Battle Droid in the set with the Rodian Jedi is (at least on my version) the Commander figure (no backpack, just the antenna) without the yellow markings.
-Dooku has a new head and the cape is "tacked" at two points on the side, which makes it easier to display him without the billowing problem the previous versions had.
-R2-D2 uses a modified version of the VOTC body and similar features to the animated CW R2. The left panel on the front opens up and a welder arm (which I don't recall seeing on an R2 prior to this) raises up, and there is a back panel that opens up and a hook on a string can be pulled out to attach to Threepio's head. The inside of this opening hatch is actually detailed fairly nicely, and the string can be wound up by rotating Artoo's head, just like the CW version. The lightpipe eye is back, although there is no sensorscope on this version which, again, is the first time I remember this sculpt being used without that feature. Cool that Hasbro went the extra mile here, instead of just repacking the VOTC version for the millionth time.
EDIT: Forgot to add that my Target had these as "on sale" for 9.99 through mid-November when I picked the Anakin/Droideka set up earlier today. So that definitely takes the sting out.