Bigger wheels require much more space lost to steering clearance in the wheel arches, but do improve ride, so perhaps more compact suspension is allowed. Bigger tyres last longer too and give better grip and braking. It's always a compromise.
The doors are great. During my lifetime there has been a MASSIVE increase in car safety: Impact/crumple Zones, safety cells, anti-lock brakes, seat belts, airbags, Side Impact Protection, dual circuit brakes, collapsible steering columns, padded steering wheels.....a monumental change from 60s cars, but all aimed at protecting the safety of those inside the car.
If car makers had to be concerned about the safety of those that the car hits, then normal front hinged doors would have been banned 50 years ago! Sliding doors (as on a few new French cars) and upwards pivoting doors SHOULD be the only legal doors. Every year thousands of cyclists get injured, and scores killed by front hinged doors being thoughtlessly flung open right in front of them. Just 3 days ago one of our tenants got a bad leg injury from just this. Like me, he is a very experienced and "Road Wise" cyclist who is also a regular driver so he knows how irritating bad cyclists can be to motorists. I know another who lost his left arm and shoulder to a car door.
Sliding/upwards pivoting doors also mean the car can be parked closer to walls to make for much more compact parking space requirements.
To add to that many people who drive big executive saloons and 4WDs now park in the middle of a parking bay to ensure they have plenty of room to swing open their large doors, and prevent getting dings from the cars either side. If safe and compact sliding/pivoting doors were mandatory these problems would vanish overnight.
As I said, "car safety" is rarely extended to anything beyond the safety and convenience of the occupants.