I have added most of the questions. See the blue comments in your post.

To all
Please post questions that we are most likely unable to discover ourselves. For example the questions about changing events or population requirements are some that we can answer ourselves if we look through the files. If there no entries then it's not moddable.
For example the question about command line/ console commands is a good one since there is no way we can discover that ourselves. If there are too many questions then I will pick the ones that are asked with the above in mind.

Perhaps we can make a new post in the future where we ask the developers to uncode some things and make the moddable. This has been done in the past with the M:TW projectile files. And the VI expansion allowed us to add multiple campaigns.

Cheers, Duke John