OK I think I am beginning to get a handle on this IR thingy. I have searched the WFPB videos and blogs for scientific backing, but it still seems lacking. However, Dr Greger did talk about Intramyocellular lipids. I think that one thing that makes the WFPB diet different from other vegan diets is the ultra low fat aspect, it seems to be as a result of recent research into intramyocellular triglycerides (imcTG) which forms a backbone to the claims being made for reversal.
imcTG is actually a fancy way if saying fat stored in the muscle cell for future use. When we exercise, the muscle cell takes free fatty acids )FFA) direct from the blood LDL and burns it for energy. When we stop exercise and rest the FFA gets stored into the TG in readiness for the next workout. So far so good.
Now there are 2 schools of thought: One is that IR causes the fat stores to fill up, and the other is that due to problems the TG builds up and stops the glucose from getting into the cell, hence leading directly to being the cause of IR in muscles. Either way the glucose pathway is impaired.
It was noted using the MRS scans that the imcTG grew too big under certain conditions, In normal people, when there was a high fat intake leading to excess FFA in the blood. In obese people, though not necessarily diabetic. In T2D but not necessarily obese. In others suffering Metabolic Syndrome,
In my opinion, if IR is stopping glucose being burnt in the cell, then normal activity (not necessarily exercise) will tend to burn up the local imcTG store pretty quickly, so the IR should clear itself naturally. Thus the hypothesis that IR comes first and causes excess fat storage does not follow, except when there is an excess of FFA due to a high fat diet. So I am tending to side with the egg, not the chicken, Ergo, restricting the FFA content severely is a way to reduce IR.
So strict restriction of fat intake is one way as promoted by WFPB, and other ultra low fat diets.
What about LCHF?
Well if you take the HF too literally, then, yes the diet will have high FFA;s so will not in itself clear Muscle IR. If you use fat sensibly in moderation then don’t go ketogenic, then that too will not reduce IR, and will tend to make it worse, But if you do go keto fully then there is a chance of doing the business. I think this may explain why some cannot get LCHF to work properly. It also explains why Intermittent Fasting seems to work since that too is a way of reducing the FFA in the blood. So LCHF in keto + fasting is a way forward, as it seems is WFPB, (but I cannot yet explain why bgl drops on a high carb intake Low GL?)
End of my hypothesis
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1971250/
I found what you have said very interesting as I am still struggling with insulin resistance and not managing to lose more weight. I have lost around 3 stones with LCHF but have been stuck for a few years now. I have been reducing the amount of meat I eat already, so could maybe follow your path eventually. I also miss fruit dreadfully. Please keep updating us with your progress. It all looks good so far. 
