I also fast periodically, as in no-food, water/tea only for 2-5 days, and once in ketosis my BG comes down to non-diabetic levels and for a couple of days afterwards. And I have found two-days in a row of actual I.F. of just one meal a day to be good too, but the effect is not so dramatic, or long-lasting, but I hope the positive effect is cumulative. (By improving insulin sensitivity and liver function, and giving the pancreas a rest/beta cell-production a break.) It seems to work well. Only time will tell if my BG can come down into the 30-something range. (That level of health is my goal.)
I don't find IFing or fasting easy, but as I have chosen to not take medications, and want to actually get as healthy as I can be as a diabetic, I see it as an essential part of my treatment-regimen, along with my LCHF/modified Paleo W.O.E. and regular physical activity.