In fairness I don't think you are correct.
I've heard from several sources, including senior members of OOF, that early on during the change in shape to the facelift Vauxhall/Opel, made some sort of balls up.
I have an early facelift Elite and it sits exactly the same as a MV6 of the same year. A friend had the MV6 to directly compare.
My Elite has also got a harder ride than normal Elites, which initially was a bummer as I got her because of the Elite comfort BUT she handles better...very much like a previous Vectra SRi I owned.
Further "proof" was the story that upon realising the manufacturing error the DVLA were contacted by VX who insisted that the "Elite's" in question must be registered as the "Sports" (MV6) model for insurance purposes.
I have spoken to the DVLA who have confirmed that mine is registered as a MV6 for that very reason, despite the fact that it is clearly an Elite. Equally, my insurance company had to write to the DVLA also to confirm, they wouldn't believe me basically.
So ! Apart from the harder ride and the fact that she sits lower like the MV6 I'm not sure what else went "wrong" or went amiss at manufacturing stage or what effect it has had.
The curious thing is though that she was originally STILL fitted with the rear air suspension.
http://img193.imageshack.us/img193/1409/10061470.jpg