Personally, I adore the concept of 2 new elements, Conscious and Subconscious, or as my friend has renamed it, Mind and Psyche. The reason I feel they
could be new elements is because they are not a force governed by any other element (I don't like giving
credit).
Mind is the direct contact someone has with the world. It is the ability to acknowledge the world using 5 senses, and carries the memories and knowledge you need to use every day. Properties of this include active body control, memory manipulation, advanced problem solving, and emotions.
Psyche is the layer below the Mind, in which your entire character is formed. Your personality, repressed memories, your instincts, all are found here. It allows one to react impulsively. Properties include personality, repressed memories, and impulse.
My argument for why they do not belong in Life is because Life is a class of beings that grow, reproduce, and feed on energy. However, it does not cover Sentient thought. Some could even say that these 2 ideas belong in Aether, because they are psionic, and the "soul" may exist on another plane altogether. In my own opinion, your Mind and Psyche are all you've got, but that's another story...
These 2 elements go in neither Life, nor Aether. They also don't fit in any other element, though varied examples of Mind and Psyche
could be applied in each element.
All the other elements offer explanations for the natural events in the universe: the patterns that all matter and substance takes. Even Entropy follows this pattern, because the interaction of atoms and electrons influence the universe in certain ways, and manipulates how and when Entropic reactions occur.
If I roll a boulder down a hill, it will land in a certain place. If I reset all the variables identical to the previous, and roll the boulder again, it will land in the same place. Why? Because it follows a pattern, and is incapable of breaking the pattern.
Humans are different. If I roll a human (or any sentient creature) down a hill, they will always manipulate the location they land in, because they are constantly defying the pattern of the universe by flailing about. Our minds allow us to break free from the pattern of the universe, and manipulate variables in whatever way we want. Therefore, our minds are not part of the pattern the rest of the universe follows.
Mind and Psyche are
not, IMO, part of Life. As I stated before, Life denotes the ability to grow and reproduce. But without Mind and Psyche, Life will follow the same pattern as the rest of the universe (plants). With Mind and Psyche, we have sentient beings that break the pattern of the universe. This is why I feel Mind and Psyche, if anything, should become at least a part of the game.
Because I understand a new element is very rattling (I was ninja'd just before posting), I understand that change probably will not happen. If so, then maybe Mind and Psyche can be a part of a series that denotes all the elements. I'm sure applying Mind and Psyche to other elements can create fantastic results.
If nothing else, Mind and Psyche can be a branch of Other.