There's hope. I just dropped off my car at my dealer. An engineer is scheduled to oversee/install "1 of 50" steering racks sent to resolve the steering vibration in my May '12 build F30. This service visit will be my 4th for the vibration issue. After the 3rd, I requested a "trade assist" but it looks like this new steering rack will be the answer to all my problems.
My advice would be to call your dealer and BMW NA and ask for 1 of the 50 F30 steering racks (unless they are all already spoken for). Good luck.
I'll let you know how my 328 drives with its new steering rack when I get it late this week. At this point, I don't know what to expect.
P.S. If you do call BMW NA, be sure to answer when they call you back. Otherwise, don't expect your "resolution specialist" to answer the phone when you return their voicemail.