The Hopper is old and I wish there was a 4 door variant. I wish there were more configs too like 3 link suspension that you can have in the Gavril D-Series. My idea would be more modern with front and read disc brakes instead of the old drum brakes in the rear.
There is a No Limits version of the Hopper on the Repo, I know it doesn't fix the other issues, but that part someone has thought of!