Re: AT-ATs
I will respect the final decision and leave it at that. Again, this will be something I will work on myself.
Re: puppet modification
The thing that gives puppets away the most are the extremities: rubbery, squishy fingers; dead eyes; stiff or rubbery body parts. In the Yoda mod clip, you may want to tone down the ear wobble (http://www.youtube.com/watch?v=wPd5lyi_6Tw - example at 0:12 mark and 0:42 to 0:50. This is different from the conscious ear movements to denote emotion as seen on 0:19 to 0:21) and keep an eye on his fingers to make sure they don't do that "bending backwards" thing rubber gloves on a "man in a suit" usually do.
re: Taun-Tauns
The ear thing may not work, but some things just to think about:
(1) if you can't include the quick "ear flick" that horses are known to do (here's a rough example: http://www.youtube.com/watch?v=8Y8lQzdXNjI), is there any way to have the ears prick up right before the Wampa attacks? No long amount of movement, just the ears facing forward?
(2) being a beast of burden, how would the Taun-Taun look if the eyes were more like a horse (all black) as opposed to having human eyes? At the least, is there any way to give a gloss layer over the eyes to indicate moisture? The eyes look a little plastic.
maybe have the Taun-Taun eyes open up larger to show fright on the creature's face:
Could also consider darkening the area around the eye per the images above as reference:
You could also consider moding the nose to have it snort or breath. Anything to indicate it is a living thing and not a puppet head.
re: http://www.youtube.com/watch?v=pzHsO92Cljw&feature=PlayList&p=4DB0EA9A58709519&playnext=1&index=10
you could add a quick .5 to 1 second ear flick between 1:10 and 1:15, or between 1:23 and 1:35; could put in a quick eye blink or two between 1:49 and 1:51.
Again, just suggestions.