[Southcross]

"increasing"? you mean "more" Toe-in?

I would expect those things, but what if you decrease Toe to a neutral Zero degrees?
Slight Toe-In I would suspect would have a benefit to turning/curve handling... as its pulling into itself on a curve vs pushing away.
Toe-out I would also expect that from the rear end, it would seem that you have two tires pulling/pushing the car to the side as you drive, gawd forbid one suddenly lost traction.