Less efficient? Please do back that up. Equinox: 22/32. That is better then CR-V and RAV4. Malibu is equal to Camry. Accord is less. Cobalt gets 37 MPG HWY. Better then Civic and Corolla. The new Cruze is expected to get 40 MPG HWY.
As for reliability. Our 1996 Suburban, 2002 Suburban, our 2006 Equinox,and 2007 Saturn Aura all have been reliable. Next.
Interior, I posted the latest GM interiors. You still say they are horrible? While I haven't sat in the Cruze yet( not out yet in the US) you say the design is horrible? Reviews in Europe and Australia have been positive about the car and the interior. Only complaint is about the 1.8 4 banger, but that engine will only be available on the stripper models here( LS trim). LT and up trims will have the 1.4 Turbo engine. I have sat and drove the CTS. The interior is better then my dads 335xi. I also like the interior of my Aura. It has decent materials and I like the design. I also love the new Equinox's interior. Reviewers say it is one of the best if not best in class.
A) Put snow tires on the car B) Put a few weights in the trunk. That is why FWD is better is because the weight is on the front wheels. Put the weight in the back, RWD will not be that bad. C) Todays RWD vehicles have close to a 50/50 weight distribution which does improve traction in the rear. Camaro is close to 50/50, not sure about Mustang. D) Learn how to drive.