Yeah, I hear where you're coming from. And I myself hesitated for a brief moment as well when I was at their booth, pondering whether or not I should go ahead with the purchase for that reason I'd intended. Especially when I found out that they were planning on bringing out their Shadowtrooper samurai, but I'll come back to that in a moment.
I also should clarify, that I myself already own one of each figure, a Stormtrooper samurai, Boba Fett, Royal Guard and a Sandtrooper with orange shoulderpad, a Darth Vader Death Star.
So, it is not like this would've been my very first purchase of this line just for that, for that would've been truly offensive to all of you guys that couldn't make it out there, I agree.
When I thought about it, to me?, the only thing that makes this "exclusive", if you boil it down to it: is only the shoulderpad; the rest is exactly the same as a regular one. Only the realisation that there is also a second sandtrooper white shoulderpad included, for more diversity, is what made me go ahead with my purchase. That was my choice of reasoning behind it.
True, I could've perhaps just bought this one, painted my regular sandtrooper black and than switched out the shoulderpads, and gotten the same result, you see.
To come back to their very own planned Shadowtrooper: I spoke to them at their booth, and one of them said that "Though it wasn't set in stone yet, but they thought about making the Shadowtrooper samurai a possible exclusive for next year." (His words literally)
Upon which I responded "Please, make it available for the whole market. Most of us won't even be able to make it out to Orlando next year."
Where the guy replied with "Well, maybe we will. We'll see."
So you see, it isn't even a certainty at this point, that the official Shadowtrooper will become available for all.
That is why I went ahead with my choice of customizing, not waiting for their final marketing decision.