Cheers! I don't think it's in competition with Tindie either. I want the site to serve a niche of creators that can't be bothered with the rest (i.e. packing and selling). I think this opens up a world of designs that don't have commercial viability. My special areas of interest are music gear and scientific instrumentation (but of course that doesn't dictate what types of designs people decide to put up).
The cost for a one-off order is always more than something that is made multiple times so I it's not a question of competing on price. Kitspace currently optimizes for one-off orders (batching orders of a single design for multiple people would be interesting too though).
I am curious, how do you think it lowers the support burden? Do you mean they can just say: "you soldered it, I don't know, works for me" or is it something more? :D
I think the stencils are best left to the batching services and Aisler and PCBway, which are linked from Kitspace, offer them too (and they should pick out the relevant solder-paste Gerber files).
EDIT: Oh, and regarding planned features check: https://github.com/monostable/kitspace#planned and the work-in-progess (WIP) pull-requests: https://github.com/monostable/kitspace/pulls