If the car is truly supposed to be unveiled later this year, I'm not convinced that any of these suggestions will make a difference, even if BMW were reading these forums.
That said, BMW, as a NA driver (formerly e90 and currently f10), here's what's important to me (in a midsize BMW sedan):
x-drive combined with MT combined with fuel efficient engines
steering and handling (I much preferred the steering/handling of my e90 to my f10. Not so much that I regret the f10 - it's an awesome car - but I dearly hope the steering/handling of the e90 can be preserved.)
Anything else I can deal with...