If you haven't watched the clone wars/rebels then WARNING there will be spoilers here about the episodes involving this subject.
For some reason that I cannot comprehend, the writers of the Clone Wars series felt that they needed to further define the Force. I don't know why they thought this was a good idea, but I feel like while what they did was mystically impressive, and had some connection to Campbell/Jung, it was a mistake.
The first thing I didn't like was that it wasn't a dream sequence as far as I can tell, and the events actually happened, much like the other crazy Tron sequence in Rebels where Time is beaten with a stick, stretched and pulled into plot putty, now a part of the setting.
The second point I didn't like was that they made an archetype for the Light, the Dark, and the Balance. These archetypes then acted, had names, and form, and said things; so they were crystallized into characters. For many people the light side now is a queen called the Daughter who died but lived on as an owl and some wolves.
George said that he is a spiritual person, and he believes in spirituality, so he wanted the Force to exist (in it's final form) as something that regardless of your individual beliefs or notions you could grasp and accept. By putting the Force in these forms, and I give them credit for trying to at least use architypes, they made the Force too specific.
You can say that the manifestations were simply in a form that Obi-wan and Anakin could readily relate to because they are both human, but the picture representations in Rebels kind of makes it clear that these were in fact the forms used by the Father, Daughter, and Son. The force is anthropomorphic, great.
Before the introduction of the Force architypes, the Force was a mysterious thing that could be used in your stories in a lot of different ways without intruding on any set definition. I personally liked the force as being this thing that has been studied for 30,000 years or so and has eluded comprehensive analysis. I liked that you can learn to be one with the Force, and have it help you do things and see things but you cannot make it into something concrete. Being a non-personified mystical energy field was perfect to me, because it allowed life in the mundane physical world of the galaxy to not have these definite answers and to have some mystery as to what was going on with it all. But now we know that a bad Male and a good Female were kept in check by a Neutral Father and that this was the form of the force as depicted by the archetypes.
Maybe you can tell me why it was better to have these characters instead of keeping the Force more undefined.