Interesting read, thanks for the comments on the video! I always take all in either it being negative or positive. This is what I felt about the car and therefore shared it. Others might have other opinions.
With regards to the roof, I can say the following that it is major "f*** up" by BMW M. I got info about the roof from an insider and what I heard was like
#triplefacepalm
Just to summarize the final outcome... The roof is painted and tinted to disguise errors you can see from a distance. They do this three or four times and sand it down by hand after every layer of clear coat just to make sure you don't notice it.
Yep, let that sink in... The roof was not meant to be like this and everyone knows it in Garching.
MR