ever replace the plugs on a late model full size Ford?
Or the plug wires on a V6 Taurus SHO? (hint...start with removing the upper intake plenum)
That said, as far as things being easy or difficult to get to or replace - Ford is a major offender there, but I would say Chrysler is far worse about poor engineering resulting in failure.
having bought a Jeep TJ about 3 weeks ago, these are the things I've discovered that were stupid
The bolt attaching the track bar to the front axle - it has a 9mm shank but the outer diameter of the threads are 10mm. So you have to put it through a 10mm hole, leaving you 1mm of slack in the bolt once it's been installed. As anyone whose had a solid axle, coil spring front suspension probably knows, the integrity of the track bar is CRITICAL in avoiding death wobble. Every bolt I've ever seen with a shank has a shank matching the major diameter of the threads. This bolt was specially made.
Then the torque value of the bolt is beyond the yield strength of the grade 10.9 bolt they used, so once it's been installed and removed once, it will never hold torque again.
Next is the oil pump drive gear. In 05 they changed to a Mercedes engine control system which replaced the distributor with a distributor housing containing a sensor and a sensor rotor. When they did this they replaced the gear that has completely worn out before 20,000 miles. Retrofit of a previous gear is possible but requires some minor machining, and that's the best fix Chrysler has come up with, even having known about the issue since 2005 and issued a TSB about it. Failure results in destroying the cam gear and engine damage from lack of oil pumping.