Ok. The maps look cool. I think I actually would prefer that kind of 1px coastline over the one we have currently. But I fear that if people were editing 1px coastlines, they'd make them "discontinous" (connecting diagonal pixels only in some places) so they can't be filled with a fill paint tool. So it's probably best to use the 2px and then convert to 1px with whatever method you used.
Red Rainbow doesn't share origin with Blaist Blaland I think, it might make sense for it to share origins in ancient times, but Red Rainbow was formed in a Glorious Gay Communist Revolution against an oppressive fascist dictatorship. (Ideologically inspired to some extent by Blaist Blaland)
I haven't really decided much about the ancient history of Blaist Blaland, but I like the thought of a more primitive society uniting and expanding across the vast and originally thinly populated country in a peaceful way. Even though I've also written some history on Blaland that it was originally a totalitarian, militaristic and imperialistic socialist country before progressing into its current state. And I also had home history fragments saying it was a highly populated area with many somewhat tribal and primitive wars and oppressive capitalism/fascism making a group of people emigrate across the land to found the capital and a new state. My Blaland drawing also kind of had its own history when I drew it by being pretty much a city state often at war with neighboring cities, conquering and annexing them and actually only controlling a portion of farmland that was a fraction of the city size it grew to, kol. Building walls around new districts and stuff. But then again the drawing feels so geologically and in other ways nonsensical I want to make a new one. But it's probably never going to happen.
Kol. Tl;dr Blaist Blaland's history is a mess currently. Historians are working will some day possibly work on rediscovering it according to how I want it to be once they get tired of having massive communist parties in the public sleeping centers at night.
