It's great that you are trying this. I have also been on a low carb keto diet for almost two years. Around the one year mark, I saw a change where my glucose suddenly dropped into the 80s with spikes in the 90s. My A1c also dropped to 4.5. Since then I have remained stable, but I am still very much carb intolerant. If I eat more than ~10 carbs per meal or if I go off of metformin I start spiking over 100 (5.55 mmol/l) and sometimes even more than 110 (6.1 mmol.l).
I also do 1-hour exercise daily, 8/16 intermittent fasting, only eat two meals with no snacks, take resistant starch, and supplement with magnesium, chromium, calcium, and B, and D vitamins. I also make sure that I am getting enough salt. I don't supplement with potassium because I am taking a low dose ACE Inhibitor.My weight was normalized within the first 4-5 months (from BMI 28 down to BMI 21) after I was diagnosed with type 2.
At this point, I am no longer expecting anything like a reversal and it looks like it is just keto for life. That's OK with me since I find my keto diet satisfying. I am also convinced that even if I did reverse my diabetes and go back to eating excess carbs I would rather quickly develop diabetes again. I have simply passed the point of no return. I also like to know that I am in ketosis (last blood ketones 2.5) since that minimizes circulating both glucose and insulin both of which cause damage.
One pleasant result of my keto diet over the last two years is that many of the complications that I had at diagnosis have gone away and others are improving.
I now think that the most promising theory of the etiology of diabetes (type 2) is Taubes' Carbohydrate-Insulin theory for metabolic diseases of which diabetes is only one manifestation.