[mrvedit]

The stability control system works by comparing wheel speeds with the amount the steering wheel is turned to determine if the car is slipping.
The ABS system also relies on wheel speeds.

Therefore, considering the work done, IMHO the most likely problem is that the wheel speed sensor was either disconnected or damaged.

A wheel alignment is a good idea, but in the interest of saving money may not be necessary, especially if the car seems to drive straight, steering wheel is centered, etc.
IIRC front caster and camber aren't adjustable anyway. (Some of us install camber plates to adjust it for track use.)
Wrong "toe" will wear the tires. Generally, any "toe out" will make the steering very twitchy. A tiny bit of toe-in is standard. Too much will make the steering feel sluggish, and of course wear the tires and reduce gas mileage. Its not hard to learn to "eye ball" toe by having the steering straight and while squatting low, look how the outside of the front tires align with the rear tires. If the front and rear track width are the same, the outside of the fronts will align with the outside of the rears with a zero toe setting. If the fronts point inside the rears you may have an undesirable toe-out condition. If the fronts point out from the rears, you almost certainly have too much toe-in.