...The absurdity is that - because of the bottom box 'National' feeder side entry - the 'chimney' above that level is wasted empty space, inviting wild comb drawing.
With the 14x12 eke, the 'hole' allows the possible (re)filling of the feeder, but I don't see anyone doing that with a double brood or bigger - especially with the availability of a top feeder. That space should have been solid on the new brood box AND the super (surely no feeding with a super in place!)
Super - but no QX? Or is it for making brood-and-a-half nucs?
Personally, I'm wondering if a 2x6-frame double-brood 14x12 might be a practical QC starting/raising unit. But, other than for a Demaree, I'm really not sure about the point of that super.