Glock makes a minus connector that's 4.5#. I think it has a little more crispness to the break than Ghost but Ghost is lighter. You will always loose some "crispness" in the break as you move towards lighter connectors on a Glock.
The connectors reduce the weight by changing the slope of the angle. A more severe slope results in a more distinct wall when the trigger bar hits it then a sudden break that most describe as "crisp". As the slope becomes more gentle the wall is less distinguishable (but can still be felt on the majority of connectors). Instead of being forced down quickly by the more severe slope, the gentle slope allows the trigger bar to slide across the face a bit more. The result is a lighter pull but the break doesn't feel as crisp. Some shooters describe it as "mushy" but that description really varies person to person.
Another option on your G22 if you don't want to change to a lighter connector would be to buy a heavier trigger spring. It'll take a little bit of weight out (not near as much as a connector change) without changing the feel of the trigger.
After all that, I have to say, the BEST thing you can do is stick with the stock setup until you've mastered the heavier trigger. If you're finding yourself shooting left or low left there's a flaw in the process. A lighter trigger can help cover it up, but working through the problem will make a better shooter. Then if you decide to go lighter you'll gain the full value of the lighter trigger rather than just covering up a weakness.
