Even if we did hijack your topic completely 😉😁!

A few of the labels are a little too close to the map edge - one or two seem to run slightly beyond it, e.g. Wirbilini Woods and Taggtrum R(iver) - which is another issue with text in CC, where the text's position shifts at different resolutions/export settings.

That can usually be solved by making sure you have the correct location point for the text before placing it (such as "mid left", "top right", etc.), because the text will only expand/contract away from that point, so it's effectively fixed to that spot. It can be tedious having to remember to change it every time if you're doing a lot of labels in different places, although you can use the shortcut arrow keys instead once the text is on your cursor to be placed.

You mentioned thinking of putting some elements onto a separate layer that could be toggled on and off. For this map, I think it's probably better to have both the regional borders and their labels on all the time. With just the labels, it's impossible to guess exactly what they refer to otherwise, including identifying how far Gongodur extends.