Well, I was planning to re-work my throttle map for better control in the bottom half of the pedal anyways, but, yes
There are actually a whole lot of reasons not to go extreme on the final drive ratio. More-so than the traction issues I worry about the wear-rate fallout with the 7AT.
According to those who've run FI on their cars, 6 and 7 (and maybe 5, too) aren't as strong as 1-4 in terms of torque-handling and get burnt up when you put too much power through them. I have no idea if moving a larger percentage of my track-time to redlining in those gears will have a similar effect even though I'm NA, over time, and eventually kill those upper gears.
And again - more shifts = more time lost to shifting, and I can't always shift mid-corner if I'm on the edge of traction, so a strategy that requires more shifting may result in more delayed shifts waiting for the car to straighten up and be a net loss.
Still, it's tempting to just slap in that 4.90 and see what happens. It would be a fun experiment, but possibly a costly one if I have to go back and put a different gear in soon afterwards