Feels like this is entirely misguided on their part. Battery packs are bulk commodity items now, they've become cheap and ubiquitous. Everyone has their own branded ones out there. And with that in mind, I just don't understand an expensive version. Honestly, even in the corner case that you need so much juice that multiple battery packs are reasonable then I'd rather have another complete back with it's extra ports available. Sure, a little more bulk but only slightly and this gives me a truly redundant solution that I can lend to someone or have a complete spare in the event of loss or damage.
In the end, given that battery packs are already light and small making a lighter smaller one isn't that big a deal. Any thing in the 10k mAh range is too big to keep in a pocket all day anyway, and once you're tossing the things in a bag then it really doesn't matter if it's a little big smaller or lighter.