I deleted your last post as it appeared only to call into question the aviation experience of the SkyDemon staff and not to contribute anything to this discussion.
Let me frame my last statement in the context of "for a piece of flight-planning software". The reason why pretty much every feature of SkyDemon is the way it is, is because of either customer feedback or prioritisation of features. So far we've had a grand total of one person ask for magnetic track to be displayed on the PLOG. There would be no surer way to ensure the eventual failure of the SkyDemon product than to implement every feature that every person asks for, so we operate based on consensus.
1. SkyDemon does not feature full vertical navigation facilities. This topic has been addressed elsewhere in this forum and the basic answer is "they will come when there is sufficient demand".
2. You are expected to work in TAS in SkyDemon; it's unclear what the "etc" in your point refers to. Again, we have a great deal of customers but none of them have so far expressed a desire to operate in IAS when planning a route.
3. If you believe some of the areas of Scotland in which we have designated FIS frequencies are incorrect, or the frequencies themselves are incorrect, tell us which ones and we will investigate. I do not recall receiving a report from you about this.
4. There is little we can do about this at this point in time.
5. Probably the coastline, which in some areas can be off by as much as 1nm but in most areas is accurate. Again, if you find that a town appears to have the incorrect coordinates, let us know about it.