Simple, is most often best. MFTB has produced Grade A Select garbage for the last 7 or 8 years. The Duonic transmission was awful, the lack of low range was a dumb decision and and there are dozens of threads on here detailing serious problems encountered by owners of the latest generation trucks. (2012+ IIRC)
In the West, it is very difficult for people to understand that "new" is rarely better. If I spent 40 or 50 grand on a truck and had the problems that some of the guys I have talked to had, I would probably be tied up in a very large lawsuit. You will never convince me that Fuso does not know how to make a rocker arm last or how to build a transmission. They are a HUGE company and this is existing, off the shelf tech, that has been around for years.
If you want a cabover, go buy a 15-20 year old NPR with a 6.0L GM gas motor in it, toss a Dana 60 with a locker in the back and go enjoy whatever it is that you do. The money you save ($20k - $40k) will pay for the axle and lots of fuel. Paying $50,000 for a junky truck and years of hassles, down time, headaches, lost work and ruined vacations have no place in my world. I have talked to guys who are on their third engine and/or third transmission, and STILL having problems with their Fuso trucks. In modern times, there is simply no excuse for this in an FG or in any other vehicle.
The only way that producing crap and attempting to pawn it off on an unsuspecting public is going to stop is by leaving the OEM stuck with hundreds or thousands of unsold vehicles that are so poorly received, they literally cannot be given away.