Do you mind sharing some details about your android, Linux, and Windows systems? We haven't run into any of the problems you pointed out. But we're far from having tested every device and OS out there.
Good questions! 1. It will sound less good. If all you're doing is enjoyment listening, I wouldn't worry about it too too much. If you're doing critical listening or mixing, it's very important that you use the spacing we've outlined. Your mixes are going to come out funny otherwise.
2. Nope...
The spherical shape might be helpful acoustically, but it's not the reason we did it. It's spherical so that you can orient it as needed to hit your ears.
actually fairly narrow. It's a small-ish sweetspot, and reference level at just .8 meters means that they're never getting all that loud, so the person nextdoor won't hate you.
It doesn't have a sub out, so input via optical or USB will only go to the unit itself.
It's not lack of knowledge at all. Spin with a Klippel SHOULD work, assuming the Klippel operator has deployed the system as intended.
We used moving microphone averages in the intended listening position...
There's absolutely nothing in the works in that regard at the moment. We have kicked the idea around of firmware updatability via USB, but it would have added cost to the IN-UNF that would have raised the price.