All maps in rotation

I’m not gonna say we currently have a lot of maps but we do have a decent amount. So why is it that when I join a game it’s only on Vasgar, Training ground, that map with all the ice, or district? Why do all the other maps even exist yet if they aren’t in rotation? TC could have slowly released the rest of the maps slowly and they would have had all the dlc done already. (Not saying that’s what I want just giving them ideas to shaft us a little deeper)
(Edit I forgot to add bunker to the list, but I think that’s all the maps I’ve actually had a public game on)