Congratulations on that weight loss and stopping the insulin!
I'd agree with comments regarding (morning) fasting levels being the last to come down. And this was my initial experience too.
However, over the last (almost!) seven years, I've learned to ignore them as they can range from low 5s to occasional highish 7s, depending on what my liver thinks I need in the way of a wake up fuel boost, and most importantly, they make virtually no difference to my HbA1cs which have been in the high normal/low end of pre-diabetic range (e.g. 40-43) for most of that time.
Best watch your carbohydrate consumption, and work with your before and after meal levels, which you do have some control over, and IMO will have far more impact on your overall HbA1c results.