Regarding the Kashyyyk Clone, the height difference bugged me for all of a few seconds. Looking at the two side by side though, there doesn't seem to be that much more that's different other than the helmet. I'm still going to army build these though. I just wish Hasbro would have gotten it right the first time around or waited another year or so to come out with an updated version. I've already got over 40 of the first ones. I look to get that many of the corrected version as well, but that will be my last big army builder. I was going to hold out for the 501st #41 sculpt clone, but no clear word on that yet. Besides I have plenty 501st between the #6 and AT-TE gunner molds. So I may not build that one up much in the #41 mold.
While the difference in height between 2-1B seems dramatic, it's not like I'm ever going to have them side by side in a scene, so that doesn't bother me at all.