Yeah, I don't completely understand why they don't come with additional arms for the Unicron stand - or a smaller stand w/arms so they can stand on their own for those that don't have Unicron, but can be taken apart and added to the Unicron stand.
I don't know if they just decided, "Oh, we'll let the Shapeways community fix it" and didn't even bother.
If you have it, you could put some of these figures on the bridge part of the Kingdom Ark, AKA Teletran 1