Search got nothing, so onwards!
These are the only ones that connect to a green dot and nothing else. There's zero reason to revisit them aside from deliberately getting into specific fights at Mandalia and B Valley. Even worse, the rare battles got dumped on those paths.
Zeakden/Bethla/Murond are at least stepping stones, and Nelveska ain't hurtin' nobody with no green neighbors. But these two are perfectly good wastes of content.
I figure the best solution would be one of the following:
A) Turn these locations (and possibly the other empty blues) into Deep Dungeon-like spots where you can revisit old story maps from a menu.
B) Redirect most or all of the ENTDs from those paths to somewhere else.
I don't know how to do either, but I'm guessing the first one is easier given all the world map/event editing stuff going around. And either my Google Fu sucks or nobody's really cracked the green ENTD selection stuff. So basically, Option A looks way better.
How feasible are those options, anyway?