Sounds interesting. I may give it a try along with a couple of other things you've suggested as the various map highlights sometimes perturb me!
I take it that this mod would still allow an actual click on a region to highlight it?
If you can stop the seas going emerald green and snowy regions going orange I'd be grateful too.
However, above all else, what I need is a mod that makes the 'movement radius' highlight more prominent. For me it seems to be a slow pulse, maybe lasting 5 or more seconds, during which reachable regions are highlighted but then become extremely dark so I can't see the map at all. The dark part of the cycle seems to last longer than the light too!