Hmm. Airbags require sensors. I wouldn't mind bumpers that were
mounted on shock absorbers. The small 14" wheels are desirable for
better fuel economy (note that almost every high fuel economy vehicle
has small wheels....there is a reason.) But 15" or 16" wheels for the
4wd version...it would be nice if there was just a little more room
to accomodate those big tires. I.E. fender flares in the metal a la
Porsche....

Brakes are adequate for the smaller wheels. Larger brakes if you have
the 15" or 16" would be nice. Wiring is adequate...for cars with
expected life times of 10-12 years.

I'd vote for stainless steel coolant pipes (and power steering
lines), and exhaust manifolds, catalytic convertors and mufflers (as
Subaru does). Expensive, but you usually don't have to replace them
but once every 20 years or so....