Yeah, the campaign calls all the stretches "upgrades", so that makes me concerned that they're all bolt-on parts rather than figures. I mean, we're getting two exclusive figures already, but I'd rather have more troops than stuff to greeble up the HISS. The missile pods are nice (and expected given that hard point on both sides), but I don't want all the upgrades to be similar stuff. I say all that assuming that anything the size of an ASP is out of the realm of possibility. That seems too big for a stretch goal.
On the other hand, a cobra MMS like in the old Sears Crimson HISS set might be doable knowing that they could reuse the tooling for a mass-retail release of a green Joe MMS. It would be a win-win, as it would be an exclusive deco of something they could get a lot of reuse from. I guess time will tell.
Mostly, I'd prefer they show us the stretch goals up front, as it doesn't really work as an incentive if you can't find out what it is until after you've met the goal. On the other hand, if they're all boring bolt-on parts, I can see why they wouldn't show them, as the collective groan might hurt future sales... or even cause a small contraction.
I'm still in, and in the back of my mind I still want a second, but I hope the enthusiasm is maintained by better stretches going forward.