Nice review. And from your 2.5 mm action it looks as if they finally sorted out their setup issues. For me (and a few others) it wasn't so much that it needed additional setup (most ukes do straight from the factory) as it was that the original neck angle and bridge thickness made it difficult to get below 3 mm action. And I absolutely agree about the diminutive size of the headstock. I understand their interest in keeping it as small as possible to make it travel friendly, but seriously, it's a ukulele - not a full scale guitar. An extra inch on the headstock would not have made a meaningful difference in portability, and sure would make getting to the tuner buttons easier.
I bought mine early in the process (order #11) and was able to opt for the carbon rods, strap buttons, and upgraded nut and saddle separately, without electronics - so yes, it would be a shame if that flexibility is lost. As for the construction of the top, if you look inside you'll see another interesting construction detail. And that is the large oval grooves that have been ground into the inside surface of the top, which I assume are there to improve the sound? The weight of mine is 690 g, or just over 1.5 lbs, which does feel a bit heavy compared with some wood ukes, but isn't noticeable. By comparison my Blackbird Farallon is 760 g.
It certainly is not as impervious to the elements as a Blackbird, given that the neck is mahogany, and the internal bracing is wood. But it's one third the price, and I really like that they are able to get it to the market for about $500. There isn't anything quite like it in that price range, so it should do well.
