We had the same problem with the hesitation/shudder when we first took delivery of our 2012 focus, approx. 1 month after getting the car we took it into the dealership for this issue. They stated that they all did it and the had come up with a reprogram of the PCM powertrain control module. We had the PCM reprogram done at 1746 miles and it has been over 1000 miles since that repair. The problem is still there and now there is a chattering when the vehicle shifts from 1st to 2nd and 2nd to 3rd under light acceleration. Ford needs to resolve this issue now.