It is in the main game, but it’s still quite a small increase. I found a way to greatly increase the horizontal field of view by emulating having a wider aspect ratio monitor:
It’s a big improvement, but it would be really nice to have the black bars contain map area as well. What it has shown me is the claims that you can’t actually play at that zoom level are completely false. I find the size of everything absolutely fine, I can recognise units just as well as I could with the standard view.