Brv does not have poor ride quality at all. It is somewhat akin to Honda City.
Regarding sound insulation, yes that's a point.
Stiff suspension , no such thing.
if its not an SUV , its really close. There is a saying "Form follows function". I have found this to be very true regarding people. But this also goes for Brv (only). You can seat 6 people in good comfort without moving the second row seats forward (what else do you want).
Petrol mileage is good also. But I am talking about the manual model and not the CVT. Due to back problem I had to buy City 1.2 cvt and I still don't like it. the fuel mileage is very bad considering that it is a cvt and 1.2.
However city 1.2 manual has good pick and gives good mileage. My brv gives around 16 at 100 to 110. At higher speed the average goes down to 14-15.
In city with heavy foot I get 11-12. But driving easily and normally I get 14 easily.
I am not in love with Brv but I am just stating the facts