Vlad I think that Orion, by default, should try to optimize around the default macOS window management solution.
To manage windows in stock macOS, you fullscreen apps and swipe between them; you fullscreen to make multi-taking usable, not because you want more screen realestate. Third party apps like Magnet change how/why people do this, instead people just maximize apps like Windows leading them to only fullscreen when they want to have more content on the screen.
Admittedly, it was very confusing the first time I fullscreened Orion. It wasn't the behavior I was expecting. I think people who want that behavior should have the option to easily change it, but I don't think it should be the default.