I dunno, guys...

[Alneyan]

It would be the "change your own nation" mod, either before game creation, or even during the course of the game. A silly example: you could have a military revolution, leading to a more elitist military, or the opposite, where your whole military collapses.

For changes at game start, it would be either customisation, or something looking somewhat like a new theme, or a variation on an existing theme.

[PvK]

Ya, either a point system, or a bunch of GM judgement would be needed, but the idea would be you could ask for at the beginning, or develop during play, some tweaks to your units, such as adding Black Templar recruitable leaders, and/or some of the Black Forest infantry unit types to Ulm, or whatever.

PvK