Why did you day "no premium demand"? There is of course substantial paid demand and I welcome it. Don't put words in people's mouths please.
If you get time, google the volume of Upper Class in the LHR based A346 fleet versus the Leisure Fleet of B744s, given LAS is a leisure fleet route, the A346 is.....premium heavy. Look at where in terms of floorspace, Upper Class ends
It does appear to be an end of life adventute for a fleet on it's way out. However you will not that United and American see no market for First at MAN and offer accordingly.
It's no different from BA not offering First on a lot of the B772s out of LHR, one must anticipate the balance of premium vs economy in each market. But yeah, good post, misrepresenting (again) what was said. No need to be so chippy!