There is a lot of debate about what is a real paleo diet. Very varied has to be part of the answer, otherwise we wouldn't have conquered the whole world so easily. Some think we ate more animal products than we now do, but that seems the reverse of what I would presume.
The new proposal is that we used to, until recently, get a lot more of our plant food in a form where the cell walls are not broken down. This fits with a couple of facts:
(1) We know type 2 diabetes is a disease of the top part of the gut, since putting in a bypass for that part of the gut cures diabetes instantly (even though the patients don't lose weight for a relatively long time). This is the natural part of the gut to be designed to deal with cell walls, and we can well imagine that it is not designed for the refined food we eat.
(2) Fruit seems to be beneficial for health, even though it has a lot of stuff that other theories claim as bad, such as sugar. But we do eat fruit mostly raw, with the constituent cells intact.