Math nerd alert!
When you increase in frame size the head tube grows. The bottom of the head tube stays in the same place as the fork mounts to it, but the top of the head tube is where you measure reach. K0 to K2 adds 20mm of height and 50mm reach.
So sin(26.5°) = 0.4461978131 X 20mm =...
Wireless would use some sort of power and a transmitter. The pole is just a magnet and the sensor is in the motor area. It is not wireless.
The Rear planetary gears work great and it's an easy fix to get extra speed.
If you optimize the bike for DH and the STA compromises the feel of the bike while seated then it needs adjusted IMO.
Steep STA are good for climbing steep hills and not much else. Everything is a balancing act and for a bike like this seated "feel" is way down on the list.
On a sub 150mm bike...
Offsetting the seat that far back significantly increase the amount of bind on the post. It will wear it faster and prevent you from lowering the post will full weight on it. But if you need it, then it might be worth the compromise.
I meet the guys from pole bikes and they where all passionate riders that seemed invested in growing their brand. They had a higher failure rate on some frames and seemed to own up to it. I for one think/hope they have learned and are making stronger bikes. I like the style of their frames...