I like the concept, but I don't believe the history of rock would need to be rewritten if no one had ever invented one. And I do believe that Cheap Trick's live bass sound would be better and more focussed if Herr Petersson played an off the rack 400 buck Ibanez four stringer rather than his 12-string monstrosities that do the soundman no favors. Whenever I have seen Cheap Trick, their bass sound has been one big hazy wall of slush.
But my unbuilt Gibson CS doubleneck bass Tower of Babylon tower would have an octaved D and G on the shortscale half.