[2022] I may have discovered some new Information about why some old saves are Incompatible with the Royal Court

So far as I know, there was no intent to preserve save game compatibility between the 1.4.x and 1.5.x patches - as is common for major new patches since there are too many fundamental changes to make that possible. The recommendation was to revert to the previous version to complete any campaigns under way.

Now it's been loaded under 1.5.x there's no way back I'm afraid!  

Just so you know, neither QA nor the developers read this forum, in general - it's purely technical support.

I'm not sure whether your information is best suited to the Bug Reports or Suggestions forums, to be honest!  

You can make a new thread in either of those forums. While you can post a link to this thread there, it's probably best to simply paste in your text from here into there.