from my somewhat limited testing so far the only stats worth a damn at the moment are agi and fort, both show dramatic changes in the way your character is able to preform physically.
I have tried maxing out int perc and dex and saw absolutely no difference in my characters ability to scavenge fish or forage over someone with 40-50 in the same stats. i have not tested with actually crafting anything yet so i will try to test that a bit but at the moment you would be a fool to not max out agi and fort in the games current state.
Agi and fort are going to let you runn faster and longer than people who dont have those skills max, and the difference is massive. i encourage people to test stats and find results and share so we can get a better understanding on the characters we make.