The difficulty level wont adjust the Ai itself but will just add more enemies. When ever I play the outpost axiom mission there about 5 enemies and sometimes enemies don't even spawn. It's kinda boring as of now especially with there being few players on multiplayer servers.
#Add Difficulty levels
steep sedge
obsidian sorrel
Something like this is already planned for the future. Likely won't come before release as it's not a priority