Folks go to edmunds to complain. Not saying that Jeep didn't build some lemons, but if you want to see what real transmission problems are, check out the GM forums.
When you compare problems reported by other makes and models of transmissions and factor in how many vehicles have that transmission, you will find the WK2 Jeep transmission is better than most.
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac