I had considered using a whole bunch of my BD miles for RTW awards but then realized how much more I could travel by using them for a bunch of one-way cash+miles awards with stopovers en-route. This gave me flexibility, more destinations and less miles used. (More cash used, but I value my BD miles quite highly still and got to many more places.)
10 sector maxium with a maximum of 6 stopovers on a RTW award wasn't as good as what I've pulled off with a series of cash+miles one-way awards.