I'm torn on the direction this site is taking. Personally speaking, I would not have focused on these topics for content (unless you happen to be that rare person who is actually working in one of these fields — in that case, my apologies; carry on).
When we created a site for "spacecraft operators, scientists, engineers, and enthusiasts", I envisioned a much more applied site. I'm not sure if this is an actual problem (we'll be doing an evaluation in the upcoming week), but it feels like the aerospace engineers and related experts have not become the heart and sole of this site.
Most of the questions seem more inspired by where the Science Channel meets science fiction then by folks who are actually working in these fields. There is certainly a place for the avid enthusiast here for sure, but when a site doesn't have a strong constituency of "doers", you lose a really important component of learning for which these sites are built.
I didn't mean to delve into a larger macro issue, but that seems to be at the crux of your question. Maybe it's worth a larger discussion.