For loyalty, I guess you can get it in the tag Faction -> Steam\steamapps\common\Warhammer 40000 Gladius - Relics of War\Data\World\Factions For population, you can modify with populationLimit of the Headquarters.xml -> Steam\steamapps\common\Warhammer 40000 Gladius - Relics of War\Data\World\Buildi...

Hey !
I thought it was a good idea to add the ability for units who's got "Clear tile" ability to create bridge on river tile (and so the ability to destroy them). It could add a good strategic choice.