I've done testing and chatted with folks that know more than me. I've got most of it figured out I think and my car is shifting firm and fast in sport/track. In drive it's fast but not as firm. Gonna need to dig a bit more to understand that.
The problem is there are about 100 shift scheduling tables for RPM, aggression modifiers, etc. So you have to make a ton of changes to normalize to insure everything acts the same "most" of the time. All the time probably isn't possible but you can hone in on when paddles are in use vs not to narrow it down.