I think that the Integral looks a bit archaic to some compared to the Beryll, Twister, etc, is because it's not as radical of designs as the aforementioned airframes used as a comparison. The Twister is freakin' huge, and the Beryll has a totally different design philosophy than what has been seen before. I don't see any real disadvantage to having an airframe like the Integral as opposed to the ultra-super-makes-a-widebody-look-small types that have been emerging as of late.