One issue I've noticed, is that while wearing the rift, a pair of headphones, and use the hydra, that I inevitably wind up creating a bird's nest.
Also, the cord from the rift to the breakout box is a bit short.
On the consumer version, it would be nice if there was a headphones jack, as well as some kind of accessory port. Hydra/Gamepad/Whatever could plug into the accessory port, and headphones into the jack. I think this would help.
Also, I think it would be a good idea if the cable to the breakout box was a breakaway cable, like on wired xbox controllers. I've already had my breakout box fall to the floor a few times, thankfully it can't take my desktop with it, since it is on the floor already. However, I would be worried if I was using a laptop.