I believe it's not only FCA, dealers also need to start taking more responsibility. I just had my service done in August and apparently identified that ball joints should be replaced under warranty. It was not until this tuesday that I got a bit suspicious of why the parts department still haven't sent me the sms regarding this part. It turns out that dealer didn't finish the request for parts properly and it takes one day to confirm parts in stock and can book for service. It seems that ordering wrong parts, forgot to finish requests are just part of the human nature (not Jeep specific).
But at least, Jeep dealers hopefully start taking things more seriously.