Staggering the wing does help eliminate some to the ineffectiveness of a bipe's lift, though little. Realize that there are so many other factors that have to be considered that it is almost impossible to clearly identify its potential flight characteristics via just a rendering. Its a heck of allot easier to do it in the computer graphics , though I too love bipes! I just don't believe that bipes should be a Fun Fly (IMO)
Kevin