I was interested in your comments about the different tones of the red, blue, and green parts. Any chance you might be able to do a side-by-side with the previous R2-R9, R3-M3, etc?
I took a couple quick shots just now to demonstrate a couple of questions I have seen in various places regarding the color variances. I have to dig out my R3-M3 from my Imperial display case, but I had handy R5-D4 from my Tatooine display and the droids from the Royal Starship Droids box set (since they were all still on my desk)...
So first up: "Can you make an R5-D4?" Well sort-of. If it matters to you that R5-D4 actually has blue highlights, then, technically the answer is "no"...

As you can see in the pic above, the White w/Red R5 droid (on the right) I built at Disney is ONLY White, Red with a few hints of Silver. The R5-D4 (on the left) we got in the Vintage line last year also has deep-blue highlights so that he is more screen accurate with the droid from the movie.
Next up - I mentioned specifically the shade of green from R2-N3 (left) vs. White w/Green R2 pieces at Disney (right) ...

As you can see the green used for R2-N3 is a darker green than the green of the Disney pieces. The Green from the EP1 12" R2-A6 is somewhere in between these two figures, so you could, if you were so inclined, make the droid on the right and name him for your packaging "R2-A6" and call it a day...
Lastly, let's look at R2-R9 vs. the All-Red body parts offered at the Disney Build-a-Droid experience... R2-R9 is on the left and the All-Red Droid from Disney is on the left...


As you can see R2-R9 is cast in a much darker red colored plastic than the Disney parts. In fact, as I mentioned in another post, the "Red" color at Disney is more like an Orange-Red, with the "Yellow" color of their parts being more like an "Orange-Yellow". I took the side shot to show how where highlight colors are (or are not) present on the Hasbro part is not necessarily where they put highlight colors on the Disney part - focus specifically on the lower-part of the leg near the foot and you'll see what I mean...
Depending on your point of view, this is the nice thing about the Disney parts, they are mostly different colors from what we've gotten before.
I apologize for the quality of the pictures, I took them with my phone. I'll dig out the digital camera later this week and see if I can take better shots.