Hey Al Bastaki, I also in the UAE and agree that the standard setup is horrible, but once you upgrade (I have RPG stage 4+) the performance is unparalleled..
Police wont stop you for frame supports, bump stops, and Fox 3.0's... I also run after market fenders and 37's,, havent been pulled over once so far (been 6 weeks already)
As for driving in the dunes, you have to remember that this truck was built as a high speed desert racer and not as a dune basher. For the dunes an FJ or a swb Patrol are far better mainly coz of the weight (plays a huuuge role) and coz of the shorter wheel base.
I was in Sweihan yesterday, my transmission and engine temperature were so high that my dashboard lit up with all warning lights and had to stop and to make things worst while cresting a dune my side airbags deployed!!!
What im trying to say is that this truck is amazing at what it was meant to do and not at we want it to do. Try driving from Awir to al Fayah on the tracks and thru the whoops, bet u nothing will keep up...