You're absolutely correct. That's being addressed and it's not likely we'll ship more with the current design.
If you see anything else you think should be improved, please tell us. We listen.
Now, with that said, we'd still sell the current design if someone wanted to buy it, and we think it's far better than anything else like it, flawed antenna design or no. The end result of this project was something a lot better than a router-- it is instead a router and a distributed systems access and developer endpoint.
We're selling now basically because our competition's product is so flawed it's nearly hopeless. Router manufacturers take neither good security practices nor good network standards compliance seriously, and the world is worse off for it. The bar these days, is really, really low. We might not be the best possible design yet, but we'll get there by including our users in our development process and helping them build businesses on open hardware and software systems.
While our focus is on enabling distributed systems, it seems that enabling the Safe Network to grow healthily by providing lots of NAT-less nodes dovetails nicely with "enabling distributed systems." Because of this, we'll be shipping a ROM that gets the latest vault code and attempts to join the latest network, or a user-selected network.
Over time we plan to introduce both more and less expensive products, as the market dictates. What we sell will always be the best we know of in its price and performance characteristics.