Nice to see this one plugging along. It's the only Kickstarter I've felt like backing so far. Glad to see they are serious about rewarding the investors who take the risk involved, however minor, in paying money sight-unseen for a game that doesn't exist.
I don't really see much merit to the complaints about a backers-only mission. Most of them seem to be from people who miss the entire point of Kickstarter to begin with. Kickstarter backers don't earn a return on their investment. The entire concept is supported by perks for backers, and t-shirts and little collectibles are only going to go so far.
Every time you preorder a game, you become part of the problem. Don't be part of the problem.