Thanks for all the info.
My dealer has told me that the update is not reversible - so if your information is correct, they must have done the irreversible version of the upgrade to my car.
I drive the car relatively aggressively, I rarely use it commute or to go out to dinner; most of my driving is Sunday drives with the local Ferrari club, and a couple of track events. So, of the items you listed, I really notice two things - missing blips on downshifts, the reduced engine performance.
The dealer has instrumented the car, and their data acquisition reveals that the computer is indeed blipping the throttle on downshifts in Sport mode, but my experience driving the car is that even if the engine is being blipped, it is not enough. The problem is particularly apparent when shifting at high rpm (4 or 5000 rpm) from 3rd to 2nd. On several occasions, the car has momentarily locked its rear wheels when downshifting - once with the Dealer's Tech driving the car with me riding shotgun. Needless to say, this makes the car a poor sports car.
To the extent that this info may help others, here are my comments (your words in lower case, MINE IN CAPS) on the items that you listed :
- 300-400 RPM boost when throttle is lightly depressed in 1st gear. DITTO
- Creep Mode is gone (no more beep when you pull Down in 1st). DITTO
- Modulated (limited) engine torque and clutch engagement on launch. DITTO
- Much smoother shifting in Auto mode (now just like an automatic car). DON'T KNOW, HAVE NOT USED AUTOMATIC MODE YET.
- Not much change in Sport Mode shift speed. DIFFERENT EXPERIENCE FOR ME. SPORT MODE GEAR CHANGES SEEM SLOWER
- Engine no longer pulls strong past 7,000 RPM. DITTO
- Seems like it takes longer to reach top RPM range. DITTO
- Still has the blip on downshifts in Sport Mode. ONLY BELOW 4000 RPM IN MY CASE, FURTHER COMMENTS ABOVE.
- Dyno showed a drop from 335RWHP to 316RWHP. DON'T KNOW, BUT I AM NOT SURPRISED.
My advice to everyone else - DON'T DO IT if you want a sporty car.
My guess is that Maserati engineered the software in common with the Quattroporte, and as a result, ruined the Coupe for sporty driving
This has resulted in 3 months of running around for me, with the car in the shop for half the time - with no resolution yet. The dealer has been very helpful, but I believe that the problem lies with Maserati North America or the Maserati Factory.
So far I am pretty frustrated, but nevertheless optimistic that a solution will be forthcoming from Maserati NA.