How about posting a list of which territories are bordering somewhere. It wouldn't have to be elegant, but it would be nice if there was somewhere I could check if say, ukraine bordered western russia. Or if those mountains blocked hampshire from wiltshire...
In my opinion, the worst part of any of the maps on this site are unclear boundaries (or boundaries that simply aren't displayed properly).
It's nice to be able to check the XML to see what the true boundaries are, but that is a pain and should not be needed, in my opinion, if a map is made properly.
It's a problem on a few maps though, so I don't know of any simple fix.
The best simple fix...be active in map production. Ever since I took the Foreman job in the Foundry, I've always tried to make sure that the new maps coming out are clear on borders. Most people have issues with maps that were on the site before the Foundry really kicked into high gear about such things.