I don't have a WK2 (yet), but I can comment on that initial small issues doesn't necessarily mean much on the overall reliability of a new vehicle. Given the overall complexity of new cars and the integration of all the systems, it's pretty amazing how well put together everything is.
I have a 2000 WJ (first and only owner) that had some minor initial issues in the first few months of ownership. But over the last 11-12 years and 194,000 miles, this thing has been remarkably reliable. Has never left me stranded. It's amazing how durable it has been.
Only had to replace the starter at 192,000 miles. Still working on original alternator, tie rod ends, front ball joints, exhaust. I have replaced the radiator, rear upper control arm and ball joint, drivers window regulator, clock ring under the steering wheel, climate control module for A/C switch, drivers seat bracket (this was definitely under designed). Only last week had to replace the front driveshaft. But these things have been spread out over time and all well over 100,000 miles into it.
Everything else has been normal wear items..... battery, brakes, shocks, tires, liftgate struts, etc; or something that broke for a reason....trail abuse or similar.
After all of the years and miles it still runs strong, doesn't burn oil. While the outside has some battle scars, it still looks good and the interior is almost like new.
My two cents on Jeep reliability and durability, though mine was built over 10 years ago. By all accounts the WK2 quality should surpass the WJ.