Well, unfortunately I don't have any answers for you....but CONGRATULATIONS on your success!! It is an awesome achievement!!
The only experience I can add from a normal weight perspective come from my teenage and college years. I was really skinny in high school (125-130)and average/normal most of college (135-145) but I had PCOS symptoms back then, without a doubt. I have had symptoms since 4th or 5th grade when I started showing signs of puberty. So, in my mind, my PCOS symptoms will not go away just because I get back down to a normal weight. I believe the IR Pre-diabetic issues will improve, but I will still have PCOS.
So, at least one thing you probably need to consider is which came first the PCOS or the weight gain? Your experience or type of PCOS may be completely different than mine. Good luck!!