Awesome review.
BTW, the exhaust will get WAAAAY louder. I have a video of "onethreefive's" 135i exhaust tone at around 30 mile on the odometer. That tone almost doubled or tripled in loudness by the time he hit 1200 miles. The exhaust system slowly breaks in as well as the whole car.
Tight or heavy steering is something you'll find in most sports car. They make it this way so that the steering have the total feeling of the road. Many people complain BMW steering wheels are tight but they are tight for a reason.
The blind spot issue can resolved with a simple back up camera. Other than that, good review. I am glad you're enjoying your car!