Well ...... I have my new GSA for a grand total of 4 days and have only covered 100 miles
But coming from a well sorted 1200GSA MU 2008 I have noticed some improvements although not ground breaking they are just better IMHO
Side stand.... actually the right length so the bike does not have an excessive lean.
Front fender.... now has built in fork protector.
Adjustable screen...... about time
Cruise control..... about time
Adjustable gear leaver..... Saves buying a £100 Touratech one
Seat height and adjustment..... At 6! tall I can get both feet firmly planted on the floor unlike the 1150 ADV
Engine finish (ADV)..... all black engine and running gear and finish looks robust.
Wheels..... Now matt finish so easier to keep clean
Styling..... Well thats personal but I think it's an improvement and quite an aggresive look.
Lights (LED)..... When filtering with LED spotlights and DRL cars seem to notice you a lot more so be seen be safe.
Early days for me but selecting first is way smoother than my K1200GT that used to clunk and lurch forward

gearbox is silky smooth, clutch is so light it beggars belief, handling is well balanced and very confidence inspiring.
I'm looking forward to my ownership of my first ever brand new BMW and hope to go back to Morocco next year to put it through its paces

what a country Morocco is
Anyway that is my early impression of my new GSA and I'm very very pleased with my purchase
Jon