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I'd invite comment on that concept!
However in general. Unequal illumination degrades gain, when combined. Similar to why N-Bays all use the same length driven elements. The combine better electrically and reinforce each other at the same points.
The Kosmic SuperQuad has the advantage of a smaller area that needs to be illuminated equally and not only avoids the pitfalls of unequal illumination, but is more likely to be totally engulfed in a UHF "hot zone," or "sweet spot" as I like to call it.
Note: I havent discussed multipath.
One of the things about horizontal ganged 8 bays, is that the Vertical beamwidth is not reduced (albeit the horizontal is cut in half as compared to a 4 Bay)...that vertical beamwidth is greater than a long yagi like the xg91, so that on axis aiming in the vertical is less critical. No need to tilt.
Ill note that the HDTVexpert, Pete Putman, placed a VHF antenna elevated to a hilltop ridge, to focus the axis of a yagi, and ALSO moved off axis of the as the crow flies heading of the transmitter by several degrees. This may hint at other phenomenon, that make a larger physical capture area of multiple driven elements (like the 8 bay) desirable for stable fringe reception with edge reflection circumstance.
Hope that makes sense.