The research done by Taylor's team say an average of 15% weight loss is required to halt the decline so your 32% is highly likely enough. You also increased your chances by dieting so soon after diagnosis. The big unknown is how much of your beta cell mass is permanently damaged and how much was metabolically inhibited but started working after the islets were unblocked but, if your FPG and HBA1c are within normal range, there is no reason to suppose that it should get worse as long as you don't return to bad old ways. You can probably relax some aspects of your diet and eat quite normally if you avoid the obvious sweet stuff and some of the white carbs. My GP was the same, 'how have you done that?' As Roy Taylor states though, it requires, 'well motivated individuals'.
One of the main reasons for not going onto medication is that it gives you plenty of incentive to take things seriously. I think that too many people think the meds will sort everything out for them and that they don't need to do anything.