[ZDan]

1st thing I'd do is swap the stock front sway bar back in. Stiffer rear springs after that.

I'm running 7k front with 9k rear RCE SS-2 on my '23 BRZ with stock sways. It is admirably neutral, even around the long turn 5 at Palmer CW (aka "Remlap) where my old '17 PP suffered a *lot* from terminal understeer!

Having played around with spring rates in other cars, IMO going from 7/7 to 7/8 isn't worth doing, go straight to 9k rears.

FWIW I'm very camber limited up front due partly to the RCE/KW top-mount design and partly some built-in asymmetry with my car, so I'm only running -3.2 front camber (at the left front anyway, sometimes more on the right for CCW circuits). While I'd like to run -3.5, IMO even if pyro temps and wear patterns may suggest "more front camber!" you are already at a point where more front camber isn't likely to give any big noticeable changes to handling balance, but no reason not to try it...

Oh yeah, also worth mentioning I have to run a LOT of ballast, 150+ lb, which all goes in the spare tire well along with the spare from my old '17 PP, so my weight distribution is quite a bit les nose-heavy at 51.5%F/48.5%R. So YMMV at closer to 55/45 stock weight dist...