There are some concerns but let's come back to earth, things still sound great and the kinks are being worked out. This is kind of unprecedented for consumers to be able to buy these at this stage in dev. The unit isn't fina.
I don't think it's a massive issue and certainly something that can be addressed before launch.
Sounds like it's being addressed in the next SDK update from the comments on reddit. Hopefully anyway.
At first I was kind of bummed about not having mine until next week, but I don't really mind anymore. By the time I get mine(thursday), all of the setup and installation kinks will have been figured out and there will be more to experiment with software wise.