I would concur - I’ve run standup and layback on wet/greasy Astro and layback is definitely cornering faster (holding more speed). Standup can give the impression of more grip but I found it more likely to pendulum and more steering lock needed to get round corners.
Agree with brass C block and it might sound counter-intuitive, don’t go overboard on rear toe in. I found this gave me (and my driving style) similar problem to standup - backend locked in and then just gives and was really hard to catch it.
Make the suspension super soft and adjust roll centres to encourage roll. Think about weight distribution and where that weight is. Personally I don’t like the feel of weight behind the rear axle which is why I don’t run shocks of the rear, brass D block etc.
I prefer to ditch boost/turbo - gear up or motor up if you are lacking. I went better with a “blinky” 7.5 than mild turbo/boost 8.5.
Finally (and I can attest to this, having run timed back to back), the body makes a difference...
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