The car does what it does, as long as you're wringing it's neck that's what counts. The videos never do justice to what's going on in the car. That said, it does sound like you're either holding back or still warming up to the car. What you want to hear in your video is the inputs stacked on top of each other, i.e. no delay between WOT and threshold braking. Jumping right from the brake and back to either maintenance throttle or corner exit throttle. This takes A LOT of seat time to get comfortable with because you have to give up your perceived margin for error. What you'll later realize is how much bigger that margin is than you realize. Kudos to you for hucking that beast around a road course, you had a nice clean line. Something I did for my Camaro and Z06 was grippy pedal covers. This made the otherwise impossible heel/toe downshift easy.
That and on the Z my wet boots no longer slipped on the pedals. Not sure if there's a compatible application for you or not. At the very least I'd conjure something up to get the gas closer to the brake. What do you run for brakes?