Note that there isn't a single default scale for symbol that will work for both these sets of symbols, as these are not scaled in relation to each other. When mixing two different types of maps like this, you'll basically have to do a little work and experiment a bit with what scale works for the city symbols and for the overland symbols individually, and make a note of these two scales (hint: store it in a map note so it follows the map).

Exactly. Tokens are used on a map during play, they aren't normally part of it (except as the odd decoration). Downloading a png map image from the atlas with tokens pre-placed in the image would make it useless as a battle map.

I guess if all the tokens are placed on their own sheet that can be hidden, and I am notified of it during submission, I can set up one of my toggles in the nav menu. That way the map can be displayed without tokens by default, but users of the .fcw can hit the link to show them.

Best way to handle that is to make sure the layer the grid is on is frozen. That's usually the HEX/SQUARE GRID layer.

• Yes. Anything you do in-map (using allowed resources) is perfectly fine. The main thing here is that you cannot find your own symbols/fills from outside the allowed resources, because this causes distribution problems for the atlas.
• Yes, that is fine.
• Yes. I usually prefer to have these on different maps, because CC3+ can really only maintain one scale in any given map file, but there are cases when things work best together.
• Nothing against tokens directly (as long as they adhere to the allowed resources), but generally having monster tokens on the map makes the image export a bit weird, anyone downloading just the png file from the atlas would have a image file with immovable tokens.

If it is just things getting to dark in the shadows, maybe consider just lowering the opacity of the Wall Shadow effect instead of trying to add point lights?

The point light system is a completely different way of creating shadows, and doesn't work with the well shadow effect. Which means that if you want to use it, you can't just set up a light source in the dark corner, you have to properly set up lighting for the entire room.