It's pretty obvious plenty of work is still getting done based on those screens. Art, writing, development.
My guess is they'd rather move ahead working at this point then get bogged down in short comings of a beta. There's always going to be short comings, but, based on the way things have currently gone, I can imagine the project getting bogged down because the dev team has issues prioritizing work, communicating and so forth. Getting into the regular release/bug fixing cycle might hinder development at this point. On the other hand, the longer the game goes without real backer input, the less likely it is it can change in time for release.
Then what did I pay for? We already found out the mod backer bonus was a waste, are they gonna drop beta too? Yaeh yeah, it's an investmetn and not a preorder and all, but considering the way this dev cycle has gone that would be kind of a middle finger.
I think what's going on is one of the following:
1. The game's still broken and he's endlessly polishing the UI and shit while he bails water out of an already sunken ship.
2. The game's fixed or mostly fixed but he's endlessly polishing the UI because that seems to be his thing.
3. The game's fake. I don't really believe this one anymore.
4. It's on the way to being finished. I'm not sure I believe this one anymore. We're at the point that my hype has basically evaporated and I have trouble remembering why I used to be excited.