(FPGA guy here - used to using VHDL/Verilog for digital logic simulation and synthesis, never considered it for board design)
Our HDL support is non-existant right now. We do have an open file format which can be created from or parsed to HDL. Do you work in HDL right now? I'd love to chat about this with you sometime - we come from the world of very large system design and there is almost no HDL usage at the system design level.
We do have a common library, all community entered and more than half edited by someone different than the creator. The library is free and public. We have a number of users of the library who havent yet adopted the rest of the upverter tool chain.
I think your answer is, "we're focused on design & community." But I wonder if you might reconsider yourselves the "Codecademy of hardware" instead?
What support is there for hardware description languages? HDL is good for large projects and is more reusable than a schematic.
One suggestion is to have a component library that is shared among all users. Each person adds components as they need them, and the library grows, as a community resource over time. Maybe you have that already? If you do have it, what license covers the library? Is it covered by the same open source license as the schematics of the users that generated the library? In that case, is it free for any user to export and reuse in full? Such a feature would negate some of the "vampire" accusations leveled by the dangerousprototypes review.
What's the advantage over gEDA, gHDL or similar? Most people with the knowledge to design a circuit would also have the knowledge to set up a tool chain and repository. Who's the market?