They would break out the numbers if they are planning to alter the line up.
2-3 months that show the G4 sales are on a downward trend is good enough...
I recall that thread and for the life of me I do not see any vents once the interior is removed which leads me to think the vent are plastic and come...
When I bought my 2014 the sales guys pointed out that the rear heater vents were optional and I would come to appreciate them. I never had a chance. ...