I am at 185k and this thing runs like a top. It shifts smoother than my '05 Envoy did. The motor is powerfully capable and surprisingly quiet because of the interior paneling. The heat/ac are amazing paired with my remote start. This thing runs & drives better than my 3 previous vehicles, at twice their age. Removable seats are bulky, but hugely convenient. Easy to see with the privacy windows all around. Not as easy as a pick-up, but still easy to work on. Easier than an import, definitely. With some neglected repairs and maintenance done, I get 13+ mpg(even using remote start). Flip out windows are great for airing out during hot weather and extended length is great for cargo.
The dual air zones with 3 separate controls. Defrost mirror are life savers. Powerful V8, removable seats, and flip windows.
Make the suspension tighter in the front to reduce the wear of the front brakes, sway, and wear. Better exhaust set up/path. Better heat guarding on underbody pieces, maybe ad a skid/splash plate. Make the motor access easier