Before jumping and spending xxx money on a mech pack or such try a dsg reset, mine had simular problems with the addition to 3rd, did a TB and DSG reset and i think due to the fault of my own it was worse (usb power savings on a laptop) but after about a week it got better, last week i replaced my TB and thought for the hell of it id do another dsg reset and it was perfect after the run in setup, if you have vagcom or know someone that does give it a go, all of my symptoms were pointing to mech but as stated, a reset and recalabration drive and it drives like its never had a problem