I think that it will help you maintain low insulin levels for longer which, as I understand it, will help decrease insulin insensitivity long-term. If you stop eating at 8 pm and then have a keto breakfast, you're esentially following the 16:8 fast:eat regime as far as blood sugar/insulin go. I had some success with weight loss by going to one meal a day but amazing results with a full keto diet, but I'm diabetic. My opinion is that it would help. I think you just have to try to refine diets to fit your body and lifestyle. If it helps you lose/keep off weight it's working for you and that's all that matters. If you find it doesn't work, hopefully you'll know what to change next.
I did a lot of reading and watching to understand keto and the guy who explains things the best is Dr. Jason Fung who wrote
The Obesity Code but you can find most of the info in
his blog. He has a real talent for giving fantastic analogies to explain how the body works, a great understanding of statistical analysis and experiment design and provides links to the actual papers.
One of the first paleo/keto books I read was by Dr. Terry Wahls. She has MS and you can find her
here. She gives an excellent break-down of our biology as well and has seen incredible results personally in reversing the affects of MS.