Thanks for the update. Maybe I missed it, but did you changed the spark plugs yet?
Another suggestion: dyno the car after the OEM software update, and again after installing an aftermarket tune. Do not do both things together without a dyno in between.
Akrapovic Evolution with Carbon Fiber tips | ESS Akra Evo tune V2 | Dinan Pulley | iND Cosmetic Package (Color Matched Front Grilles/Reflectors/Side Gills) in Space Gray | LUX H8 Angel Eyes