at, you don't have to be the odd man out. I'm a loved of single point coaxial speakers, so, OTOH, the idea of that many drivers doesn't appeal to me. OTOH, I see the benefit of the configuration as being similar to the benefit of coaxial. Almost as if the woofer on the top and bottom are creating one huge woofer with the stacked tweeters being the center high frequency point.
That said, it's all just theory because I've never owned four of the same speaker to try stacking them.