missing the sweet spot on the meter does not simulate a hook or slice, it is just random that sometimes the ball is affected in that way.
An option that allows the user to select fade or draw, and the degree of fade or draw as part of the shot setup (similar to the dot on the ball for spin) would be a great addition, and one that is used in other golf games already. Heck, you could even do it with the existing golf ball / dot combo used for topspin/backspin. If it is on center it should address only top or bottom spin, and hit it straight, which is how it reacts now. If you unlock the 'centered only' behavior of this dot, and allow it to be dragged left and right as well, you could build fade and draw functionality into the shot.
IE, there would be 4 quadrants to the golf ball//target
For the current right handed avatar, it would then:
top left: use top spin and fades
top right: use top spin and draws
bottom left: use back spin and fades
bottom right: use back spin and draws
obviously, the father from center you get, the more drastic the top or bottom spin and the more drastic the fade or slice.