My car went to the dealer Friday for further inspection. They opened a PUMA case and contacted BMW engineers. According to my service adviser, the engineers are "aware of the issue but have no remedy at this time". My service adviser indicated that we've reached the end of the road and don't really have any other options right now until engineering publishes a TSB with a fix.
Coincidentally, they gave me a 2015 328i as a loaner and the wobble is nearly non-existent. So BMW figured something out between my 2013 and the current model year to eliminate 99% of the wobble.
The 2015 also has the most current NBT head unit/Navi and it is so much faster and the display is much better than my 2013.
I guess my last ditch effort will be to contact customer relations Monday to express my frustration and see what they have to say.
