Remember that stock alignment is 0 camber front and -1.2 camber rear.
So you do track car. Then i guess worth increasing front camber to ~ -3dg front, rear to -2.5dg. That should both add grip and even out track tire wear and change grip bias to more neutral.
As to why manufacturers usually do stock alignment to more understeer-ish bias in modern cars, because it's supposed to be "safer". People driving cars have very varied skill level, and more often then not lack skill driving on limit, knowing little how to deal with oversteer, but understeer is easier to handle for them, as they can always do usual thing - ease on gas or press brakes "to fix". Countersteer? Hah, if for them car doesn't turn enough due front pushing out, they turn wheel even more
. No manufacturer would want to face any liability or have reputational damage for one of it's cars labeled as death trap just because 9/10 of average drivers have lacking skills.
Remembering MR2..
