There are a bajillion threads out here on this problem...
Sounds like all of you are candidates for the Transmission Adaptive Relearn procedure.
Note: It may take 200-300 miles of driving after this procedure for the shifting to smooth out. I had harsh 2-1 downshifts and 2-3 upshifts. The harsh 2-3 upshift immediately disappeared after the procedure but it took about 300 miles of driving for the harsh 2-1 downshifts to disappear.
That was almost 4000 miles ago and my trans is still shifting beautifully.
If your dealer hasn't performed this on your initial complaint to them about the problem then you may want to consider going to a different dealer. This problem has been around since early in the 14 model year. None of them should be unaware of this TSB after all this time.