I am wondering that only 7% of the participants plan to use air cooling. Maybe the name of the product suggest that you only can use water cooling or the poll image in the threads looks like a only water cooling related poll.
I've been following the project, but didn't vote on the poll.
1) I do think that the product name suggests it's primarily for water cooling.
2) Despite your reassurances, I'm suspicious that air cooling is really a reasonable option, with the GPU in front of motherboard configuration. I'd love to be proven wrong. I've seen a few comments here and there to that effect- until you post actual tests, I think a lot of people are going to feel that way.
3) Unless the cooling is really, really a step up on other SFF cases, being 3 liters bigger than the A4, Sentry, LZ7, etc. is a downside for me, so I haven't been that interested, and didn't want to respond to the poll either.