These are issues I've been trying to iron out since the car was stock. From the day my wife picked up her 2020 mustang gt pp1 the trans has had 2 odd behaviors.
1st- when you floor it, there's a noticeable "lag" between the car downshifting and throttle input. I've confirmed full throttle, no limiters, no spark issues. Everything is dialed in fuel/engine side. Like I said, it even did it stock. To better place it, it's like you floor it then there's a .5 second to hair longer period of full throttle without down gearing
2nd- at like 55 or 60mph If you floor it, it will down gear and after like 200rpms decide hey I could of dropped another gear and does it. So you get a strange downshift, acceleration amd then another downshift.
Like I said, it's done it since the day we broke it in bought brand new. I wonder if it may be due to being a PP1 and the gearing that comes with that? Or what. Just strange.