I know you have decided to pass on the WK, but I will help you solidify that decision. I don't think the diesel is any reason to stay away as much as the WK platform itself is.
I am an admitted Jeep fan. I grew up with them, I have several, my folks had Jeeps growing up and even my grandfather grew up working on their Willys. A few years ago my wife and I bought a like new, one owner 06 with QDII and Hemi. It seemed like the perfect on/off road compromise Jeep.
I think the excitement of a like new Jeep with a Hemi clouded my impression. The leather seats were rock hard and uncomfortable on long drives, there was absolutely no storage space in the interior (even for every day stuff), the interior finish felt cheap and the blind spots created by the A and B pillars were unnecessary. It sat so low I had to jack it up to change the oil, I had to put two radiators in it and the doors creaked and popped when off the pavement.The final straw was the transfercase shift recall that put the WK at the dealer service center a lot. After the recall it wouldn't go into low range. I don't remember how many times it went in for the issue, but the dealer replaced the actuator a few times, did wiring harness work and even some programing. In October of '15 we took the WK to Ouray and 4low failed again. It was sold in November with 84k miles and was replaced with a 100 series cruiser.