You really have to be confident in the product you are buying in to and if you're not confident you should look to other well respected, tried and proven manufacturers (Landcruiser, Prado, Pajero (I would never suggest a Patrol!!! - that's another story
)). I've owned a Prado and it served me incredible well for 7 years, I just didn't like the new look.
Many of us have already crossed the line by buying, in fact a few of us have had our cars for just on 1 year with some a little longer. My car has been fine but I have not yet taken it offroad. Many others have also not gone offroad but their cars are failing them, others as you have read are failing the most basic of 4X4 tests in the sand and what's worse is Jeep is essentially asleep at the wheel.
The sand issue is a major concern as is this corrosion issue in another thread here. If Chrysler would only break its silence.
You need to bypass the sales person as he / she will only ever tell you what they want you to hear. The fact is they themselves simply don't know how to fix problems, their drone like mentality only has them fixated on sales alone.
As in anything man-made, there is always a bad apple in every box though it would appear Jeep is suffering with a higher ratio of bad vs good with their product.
Read this forum both here and abroad, read the pros and read the cons and then make an informed decision.
All the best with your decision whatever you decide.