I have figured out what is wrong with this car. While it may still look like the i3 concept, the car itself no longer looks like a concept car. The fact that it looked like a concept car was the one thing I found appealing about it.
I think BMW overplayed the concepts to the point of inevitable disappointment with the production car.
Your post also brings up a question I have had for a while. What does BMW consider to be "Sheer Driving Pleasure" nowadays? Is it the novelty factor of useless toys? The smugness of driving a car that emits 0.001 less g/km of carbon than an equivalent Mercedes?