Overall I'm at 85 hours in this game and I'm on my third playthrough. I played the Black Eagles twice (first playthrough 45 hours, second then 30 h), now I chose the Blue Lions.
Spoilerfree I can say after two playthroughs that this game doesn't seem to have any right or wrong. It's more a story of "winners write the history". You, as the player, always get the feeling to be in the right in the end, even if there are some wrongdoings along the way. I am excited to see how differently the story will be on the Blue Lions route.