The limiting factor i see with a remap is that you have no way of monitoring knock levels, you cant pull timing out/add timing where needed in an emergency, you are limited to who can do the work (for Wog there is no one in the Tassie currently) and each and everytime he wants to make changes to the cars set up or tune then it means getting another chip sent, putting the car on the rollers and checking it (if its not right or needs tweaking then you have to wait on another chip) and then back on the rollers!!!
Im going from a remap ECU to a PFC for a few reasons, i have an awesome tuner here that is local, he is doing mates rates, has great work ethic and takes pride in each and every car/tune like its his own.
At the end of the day its different strokes for different folks and i know the Wog isn't the easiest guy to change his mind once its set