Personally I'd like the option. From a gamer's point-of-view it's irritating to uninstall a game and then have to go hunting through obscure locations to clean out saved games, caches and other data. Being able to specify (a) "default folder" (b) "app folder" or (c) "My Docs\app name" for local storage would be a neat little feature, if it's not a massive hassle to implement. It'd certainly be a courtesy to players. Not sure how much control over this NW assumes and how much control we have on our side, though.
agree, would be great to have it as an option