It's got the phenolic in the middle of the butt ready to be cut into a joint, though, no?...
Perhaps not quite orthodox, but I can tell you that if I had the cue, I'd wanna use it for all purposes. As a break cue and a playing cue (and maybe a jumper depending on tip, ferrule, and shaft taper)!
Put a nice 13mm shaft on there with a phenolic ferrule and hard leather tip, add the jump joint, and voila! Only thing is the jump joint is gonna add some more weight on top of 20oz, huh? That may be an issue...
I don't know how many people out there play regularly with such a heavy cue...