First love the game. I know you are busy with the new map and account system etc. so i know this wouldn't be high up in your shefule but i would like to see a Google Stadia version as espacially the crowd play feature would be cool for among us. Maybe some time in the future.
Actually, the way the made their game according to its engine(Unity of course), the game uses 2D assets to make it look like a 2D rendered game, but after I watched a video from Shesez, it’s quite clear that the devs are using Unity’s 3D engine, and that is what makes it harder to develop a new map, rather than make it just 2D. Do making 2D games in a 3D game engine isn’t like impossible or something, but it is still hard because you have to manage a lot of assets in 2D. So there, now you have the answer to why a new map can take too long to develop for a 2D(3D if you find yourself sure about it) game.