Oh yeah, you'd have no problem replacing that rocker or that oil cooler. Youtube and forums are your friend for little tips and tricks too. Also I had forgotten about the casting sand thing XD but by now those issues would have reared their ugly heads.
The JK's from 13-18 really don't have much else going on issue wise. I think another common thing is the HVAC control will blink at you for one minute after every startup, and it is the module inside of it for the rear window defrost for the hardtop that fails... even if the Jeep is originally a soft top. Leaks happen, usually it's from impatient or rushed use of the freedom panels or the soft top in general though. UHHHHHHHHHHHHH and wheel speed sensors. Usually the fronts go first, and you'll know it... ABS, TCS(ESP) and Check Engine will all light up and usually when you first pull away after a startup you'll feel one of the front brakes grab for a couple seconds. But those sensors are $25.... and a lot of involved labor to swap.