VaiFan
Been here awhile...
One thing that may be coming into play here is location. I'm thinking there's a trend developing with more suspension/ride/alignment and tire issues with cars in the northern States & Canada than are being reported in the south.
I have no idea why this would affect alignment but I do know that the roads tend to be quite a bit rougher in the north simply due to cracking and heaving during the freeze/thaw cycles that happen for several months every year. If you don't have tar strips filling in the cracks every few feet, the car doesn't have to deal with them. There is no question that the Genesis performs very well on smooth pavement, and it is the quietest car I've ever owned. So when you start hitting the cracks and tar strips the intrusion of the noise is all the more apparent.
Don't get me wrong, I know that Florida and California etc., have their share of bad roads, I'm just saying that their "share" is smaller than northern NY or in Ontario.
Just a thought that might partially help explain the wild variations in satisfaction with the ride etc.
RW
Obviously you have never driven through the land of Antonio Viaragosa.
AKA Lost Angeles.