+xHi Tim,
I cannot agree to your „arguments“ too.
As a professional tool, SD shall be based on the legislation and not on pilots mentioned, who have obviously not received a sufficient theory training.
For your convenience, I provide the link to the official text:
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How (some) pilots don't know about this, is beyond me.
Here in Germany, if you fly above transition altitude (which I hope all pilots know what it is) of 5000 ft, you should follow the semi-circular rules as you have shared.
Of course, typically, VFR pilots in Germany will fly in Class E, which even though is "controlled" airspace, 2-way communication is not mandatory, so I guess some pilots will not know and not care about the assigned flight levels which one should fly at, but I'm really surprised to hear someone saying they don't know of anyone who complies...
*On the other hand*, we are talking about flight levels here, not altitudes. So even if I would appreciate being able to choose the appropriate "altitude" that I would like to fly at, it would have to be converted to Flight Level, so I assume SkyDemon would need to constantly check the local QNH and convert to Flight Level, by taking the "real" altitude from GPS? I agree it sounds complicated, so in my mind there are 2 options... either doing it properly, getting the laws from each region, and providing a proper suggestion to the pilot, or not having anything at all and just allowing manual input. But indeed the suggestions as they are today are totally useless (to me).