A slightly tighter rear diff can help control the car on turn in, more aggressive under power coming out of the turn but easier to control slide if it happens... but don't loosen the front to try to get the same thing... they are independent.

How much brake do you run? I run about 35 to 40 on the ESC (cant remember) so I can not skid in a straight line and once I am slow it barely stops itself. Just a thought. Also, no active braking... not sure what ESC you are using but that will usually boost braking for on road guys.