Building a rough usage off road vehicle with all electronic control systems prone to instantaneous and catastrophic failure. No place for these systems in a remote area vehicle.
Never ever building a vehicle with enough engine. A two tonne vehicle with heavy towing capabiliy needs at least 5 or 6 litres of grunt.
The bloody handbrake, the lack of ventilation, and the lack of driver space have been mentioned buy others, I concur.

