The fact that we're getting an R7 droid as part of the droid factory ROCKS. I've always wanted to see them make figures of the new model EU astromech droids. The B-A-F method helps this out immensely.
Also, as was predicted, it looks like you'll be able to mix-and-match parts should you want to create unique droids.
So I wonder how the Protocol droids will break down - will it take five or six figures to make one protocol droid?