I get your point regarding the size of the sweet spot, but that in and of itself is unnatural. That's not how one hears things when one is at a live acoustic event when one moves around. The Ohms are much closer to the live experience with this one aspect.All HiFi is unnatural.
As one who has mixed live sound, recorded large orchestras in great studios, attended concerts in the worlds finest halls, continues to produce live productions in our local 450 seat venue, I categorically state that NO HiFi anywhere anytime is anything but an extremely poor simulacrum of any live performance, acoustic or otherwise.
IMO, the flaw in the Walsh theory is that sound from instruments is not omnidirectional. An acoustic guitar sounds very different as one walks around a seated player. The Walsh driver takes the frontally recorded sound and flings out 360° to bounce and absorb erratically in the listening space. One may like the effect, but it is in no way similar to any live performance.
To hear a recording as made requires a system as good or better focus than the recording studio monitors.