I'm glad to hear my feedback was helpful, I could have been more thorough but I got caught up in enjoying the demo instead of making concise notes.
Having an ultrawide monitor it is just a matter of immersion, though I understand that there might be situations in which you want to use the standard 16:9 ratio to obscure things or just have one ratio to worry about, so if it isn't easy(ish) to implement don't worry about it.
Another tangent, but are maps going to be part of the game, I understand that they need to be made from scratch so I would understand if they weren't something being considered.