That is the thing with this surgery, soft tissue changes can not be predicted with high confidence and guaranteed for the better. I personally prefer my old face before surgery, but honestly even if I a not a huge fan of some of the aesthetic changes, it was a fair price to pay to make my bite class I and functional. Did your functional issues get resolved?
You're also 3 months out. Give it time and things will settle more, but in general at 3 months you should get starting to get an idea of where things will be.