Hi Mike 58
Have also just taken delivery of a new 1.4 EX, which is now my third EX since changing from a Landrover Freelander 1 some years ago. I have say that the brakes are no different from my previous Jazz cars. Yes, they are significantly more sensitive than the Freelander, but I soon got used to them and find them no problem at all now.
I suppose it's a case of what you are used to, certainly I prefer them now, knowing that the car will STOP when I want it to.
I remember in my much younger days, I once had a 1930 Morris Minor with cable brakes, which required almost your full weight on the pedal, in order to stop reasonably quickly, now that was hairy!!
I would submit, that in a couple of weeks time you will wonder what all the fuss was about.
Best regards.