Interesting
Here is a youtube video from designer Frank Stephenson talking about the overall design of the new 4-series. He talks about front grill and his thoughts and opinions on the overall design. Based on the youtube video and wiki page he worked on the X5 (e53) design.
https://www.youtube.com/watch?v=qSj1Nj2rTc8
His wiki page listed below states he was involved in the design of the X5 (E53) along with other cars, take a look at his wiki page under design career
https://en.wikipedia.org/wiki/Frank_Stephenson
Just his opinion