For me not mixing food is key.
Even with a cooked diet this problems can be solved easily.
Vegetarian and keto diets both do that by choosing just a metabolic pathway.
My grandparents didi this all their live! And they relied on a traditional cooked high carb diet. One meal, one dish.
Normally, there was no meat, but if there was meat, there wasn't anything else. Or carbs or fatty meat.
Regarding metabolism but not digestive optimization:
You can eat vegetables with anything
Carbs on their own. Starch and sugar can be mixed. Fruit on its own (because of water content, dried fruit can be mixed with starch)
Protein with fats is perfectly good. This should be the most important part of a raw paleo diet.
Don't mix protein with starch and very important don't mix it with fruits/honey. I used to do this and I got terrible headaches everytime.
Don't mix carbs with fat, because they are the two major metabolic pathways, so that they will compete with each other (Randle cycle). I know that Aajonus claims otherwise, but I have to disagree on this one.
Let's think otherwise:
In the morning gather honey/fruits, eggs (few calories, little protein)
Succesful hunt, eat meat/fish (thrive, most of the calories and nutrients)
Unsuccesful hunt eat tubers with vegetables (little nutrition, enough calories, and a big insulin spike, in order to preserve muscle, electrolytes and survive)
I think that carbs, probably cooked starch, had a role in anthropological nutrition. Not as a healthy nurturing food, but as a fallback food. The effect of insulin when in times of scarcity would be the most important survival tool versus other predators that would starve whenever couldn't hunt.
I'm an antivegan, but I understand why it works, at least in the short term.
