I would concider the lack of control joints a major defect, and would be very suspisious of any cracking in the finish, any damaged areas should be quickly repaired.
The problem with this system is that I have never yet seen one installed in accordance with the manufacturers installation guidelines, and that any moisture getting behind the finish will destroy the sheathing long before its presence is visible inside the structure.
I would recomend futher evaluation by a specialist in this type of finish.