Quote Originally Posted by laevex_esre View Post
Should it not have a scale bar at all then?
Yep, no scale bar. If it had been a straight Plate Carée, then scale would have been consistent for measurements along the equator, and along meridians. As you have a different scale factor for latitude and longitude they are not consistent with each other. All other distances are all over the place regardless. After all, the entire top and bottom edges of the map each represent a single point.

Quote Originally Posted by laevex_esre View Post
That’s because they’re not rivers. They’re just big estuaries caused by a recent raise in sea level. I do intend to include the rivers, but it seems like a lot of effort right now.
In that case they seem too long and the ragged edges are still odd. And they are still going to look distorted when you do your larger scale regional maps, at least those of them in higher latitudes.