Perhaps, but that does nothing to change the fact that a standard reg is an obvious, and superior choice to an alternate airsource/inflator with failure points.
First off, it's not a fact - just your opinion, which I do respect BTW.
Are there better solutions? Certainly in cave or wreck diving but for the basic run-of-the-mill recreational non-confined space diving the AIR2 (or similar) octo's is a good choice and a personal one as it is not the device being shared.
Would you refuse to dive with a diver that sported one? I would not.