Hesitation...
Hi Matt, after a lot of aggravation, and getting nowhere with Ford, I finally managed to get the car looked at by Peoples Ford in Liverpool who kindly updated the ECU software to the (then) latest version and the transformation was phenomenal!
the car was faster, more responsive and most importantly of all, there was no trace of hesitation.
based on my experience, that would be the first thing I would suggest if you have the same issue?
good luck!