On a 2012 dodge journey, I am experience this also. Similar to some poster, I had experienced the hard shifting when slowing down too. It is really noticable when going downhill. Also, when going up hill, OD does not disengage, you must press the accel pedel down about 3/4 of the way, which causes the engine finally come out of OD and then down shift 1 or 2 gears.
The idle is also rough for a new vehicle. It shakes like an old 4-cyclinder idlling.
When I get it into service, I am going to mention about this article http://www.dodgejourneyforum.com/index.php?/topic/2474-first-big-service-on-my-2011-crew/
With the rough idle, it seems like its the TSP or IAC value. It acts like the IAC valve (idle speed motor) is weak.
This is must first new vehichle. I had no choice becaues of expanding family and driving distance. Needless to say, this is why I don't buy new.