From what I understand, carbs are not really an issue. First there are many different types of carbs, some even non digestible by you but by your gut bacteria (prebiotic carbs like resistant starch, fructo-oligosaccharides, inulin, etc) and those are generally good and will not affect your blood glucose or insulin levels (on the contrary, they will tend to blunt them if you happen to eat other carbs like sugar, a very neat thing for p(pre)diabetic people).
The second thing is that fat is good but eating truckloads of fat is really not the point unless you want to be in a ketotic state where you mostly rely on fat for energy (very low carb of any type, moderate proteins => some thrive on this, I don't because I wouldn't know what to cook - I am French so cuisine is important). If you do carbs and fats t the same time, be sure you will store the fats efficiently. Fats like animal saturated fat and mono-unsat are really nice. Poly-unsat are not so nice, especially the omega-6. The latter is good when inflammation is needed in your body to fix up some acute issue. But chronic inflammation is the opposite and a constant diet of excess omega-6 promote such a state ... bad. When mixed up with sugar, it is a health bomb and will screw you up.
So eat fat but don't overdo it, eat carbs as well from natural sources and you will be fine. The primal diet is mostly a non inflammatory diet because it relies on real foods without much toxicity when enjoyed without binging. Things like white rice, potatoes, organic raw dairy (A2 type), bananas, and all sorts of other "insulinogenic" foods are just fine provided that your metabolism is fixed up (a few months without chronically ingesting inflammatory foods).
I hope this helps because the so-called VLC path, while a good thing once in a while, seems (to my mind) like it contains some "dietary blindspots " which can lead one to feel crappy on the long run. It's like a vegan diet: at first you feel great, but eventually you feel strange and crappy. I am not saying that it is not working in the long run for every one but if you are in a detox phase, keep in mind that eventually, you might have to switch to a more varied diet when it comes to macro-nutrients.
But most of all, enjoy being primal and don't overthink it