Agreed the seat could definitely be more aggressive about cupping the goods. It is actually a lot better in practice than what you'd think just sitting down in the car, statically, but it's still work that should be used elsewhere and I find myself leaning pretty hard, gripping like the frightened noob I am, and not as grounded as I'd like to be when tossing the car around.
To aid in this I've have set up a separate Autocross specific Driver profile. Things it does:
1) drops by butt even lower than I typically street drive, this effectively bring the front of the seat upward and presses into my lower thighs a bit
2) adjusts the front back some, for where I want my field of view
3) move the seat back back to allow for my helmet at the top
4) moves steering wheel to account for the above changes and how I want the front-back location to be
5) turns temps to metric, because science (I think I'm going to switch speed/distance to, so it's bigger numbers
)
As per MPP's post above, I may in the future now try out having it set to have the seat too far back. Looking into that belt locking time, pretty cheap really. Then my "get into the car" procedure would be sit in, select the "X Plus Size" driver profile (yes, that's the name I use), buckle up and cinch, then manually bring the seat forward using my wrist on 12 o'clock of the steering wheel to gauge when I'm in the right spot.