I hear ya!
I ask that question all the time - why with the Clone Wars can't there be a case mix where if there are four figures new in the wave, that there's just 3x of each figure? Or if it's a five figure wave, 2x of three of the figures and 3x of the other two.
Assortments like that would come in extremely handy especially when it comes to ordering by-the-case online.
I'm sure Adam can't answer, but I would love to know why an outlet like EE couldn't force Hasbro to give them more online "friendly" case assortments like those.