Perhaps BMW do listen after all? One thing I have learnt is, wait for LCI 
New lights and bumpers (the latter probably not with Sport models, same as E60), new 550i engine, US to get 535d engine, revised steering which might solve some of the handling issues. Production in June/July 2013 available Aug/Sept 2013
New on the left, old on the right

New lights and bumpers (the latter probably not with Sport models, same as E60), new 550i engine, US to get 535d engine, revised steering which might solve some of the handling issues. Production in June/July 2013 available Aug/Sept 2013

New on the left, old on the right