I thought that I read if you've pre-ordered an item from EE, you are able to cancel the order if you're unhappy with the final product once it's revealed... I'll try to find that reference.
I'd keep going but well, it is being marketed as a bit of a mystery set. (And don't forget EE lets you cancel any pre-order with no penalty if you order it on Tuesday and decide after the announcement that you don't much care for it. Risk-free, yay.) That's good enough for now, I think, so there ya go!
Found it. I'm still glad that I ordered this set. If you look back through what Adam did report, he said that there will be a lot of accessories (guns, holsters, backpacks) and a lot of parts to 'inspire new creations'. If it were one Mando and 13 clones, I don't see that being possible. Also, he said that 'the characters in this set, by and large, look quite different from one another with a couple of exceptions'. I'm going to bet that there will be numerous clones (I'd bet two to three per pack) and multiple Mandolorians. I'm still holding out hope for the SA Jango, Kal Skirata, and null-ARC Ordo. I guess we'll find out next month.