Has anyone found a good way to edit/remove crafting requirements for the engrams?
I’m asking as I am currently working on creating a “Creative Mode” mod. But if it’s already been done, please tell me.
Do this with the Total Conversion system that should be out on the 13th (tomorrow!!! wooo!) 
I say this because what you want to do is essentially alter every core engram and remove their requirements/prerequisites which will more than likely make it fall under a total conversion type mod.
Theoretically you could do it without, but prepare to be editing values/variables for a looooooong time, and I would be prepared to deal with lots of mod compatibility issues down the line.
Check out this thread Drathek made on how to mass edit things (that will be your savior with this): Mass Editing Tip - ARK: Survival Evolved - Unreal Engine Forums