PA News:
I agree entirely that a clean sheet design would probably have included an further increased cabin height.
It is interesting to note however that the figures I have been given in the past by the various manufacturers seem contradictory to the general perception (but I am open to correction if these cabin height figures are incorrect):
EC135: 126cm
MD902: 124cm
A109E: 128cm
Any observations on the Grand from the info you have to hand?