Hey there! I like the idea behind your mod. I would like to suggest some feature's to use this mod more frequently.

As example you can build wood houses without Problems.

My Suggestion A

Wood == Planks

Make Wood decaying if its next to dirt or grass (So you have to use atleast 1 layer of something not decaying)
Make Wood decaying if its rain -> you need a better roof.

I think that fits the primative stuff. Do you have a discord?