24,000 miles into this 2nd 159 and things now much, much better.
No rattles, very little wind noise (compared to last 159) and brakes are good
Paint finish generally much better too.
Tyre wear also much better since I had the laser alignment done.
Still surging on full boost
and crunching from 2nd to 3rd gear but these are fairly small annoyances compared to the issues with teh 1st 159. They'll get looked at during the next service in a few thousand miles.