Not to impressed with the Britannia map, but the PE map needs it's whole river system redone. Don't know of any singular river systems that empties on so many coastlines. Roleplaying a map with that sort of river system is like trying to roleplay in an mmorpg with people running past with names like "darkkillerzz76"
Not to bothered if they decide to keep the name "The World" though, since why would would the inhabitants have a special name for their world, unless they are aware other worlds exist, and so need to distinguish it.