Actually I tell my DD to pinpoint hitting the center (basically aim for an inner circle, let's say 2 cm radius) of the ball regardless of what type of pitch it is. Aim small, miss small, no point swinging for the entire ball. Same thing when throwing, pick a spot, don't throw to the entire object
"Take dead aim" - Harvey Penick. This was an idea that I was introduced to during the short time I was torturing myself with the game of golf, but it absolutely applies to softball/baseball. Having an intent to hit (or throw to) a precise point will tend to get the body working in a way to produce that result.