Hi, thank you so much for the thoughtful and well written feedback! Let me answer your points:
1. Yeah, unfortnately some ASUS boards are breaking the ATX standard, I will see if the trend will continue and if I will have to change something. P-ATX and U-ITX are affected by this while N-ATX isn't.
2. Definitely on radar, if I figure out the tech and if there is enough space in the case for bigger attachment points
3. glass would be very hard to perforate in this way, acrylic would work and I have been thinking about it but the issue is that they would lack top and bottom flanges so the top of the case would look bad. But I will think about the solution in any case 
4. If you can invert the case you can have the button on top
It will most probably be possible since the next batch, and it already is on U-ITX and N-ATX
5. It is on the back on the case, it can be on the bottom if you invert it. I can't put in under the GPU unfortunately, that would increase the volume too much.
6. I went for the visuals in this regard, multiple ports would look bad. And I though since it is a small case rear ports are more accessible anyways, that is why I omitted the front IO on the U-ITX which is even shorter.
7. It is accessible through the vents, just use something narrow and non metallic to hit it 
8. I do sell some rubber feet for horizontal orientation, but for vertical orientation it is better to use a wider stand since the case is narrow. You can ofc use it with those rubber feet but it will be less stable and GPU exhaust will suffer somewhat.
9. Could be an option and I have though about it but I would need to find the way to attach it which is bit more complicated with variable GPU mount this case has.
10. never though about this tbh, there are some holes in the back for mounting wifi antennas but I haven't seen any magnetic ones tbh.
11. I think this is too niche and would be too complicated to add for a feature that wouldn't get much usage in real world. But I will think about a 3D printed bracket addon
12. Yes, this is on my radar, good idea 