@@IrocJeff
The Mortis arc, the one you've mentioned, is perhaps one of the most disputed in TCW and Star Wars at all. I will admit, that the ideas of the Force and its balance - is a good move. But the performance in these episodes is what I don't like too much. The mystic planet and a "piramid" (or whatever) in space might be okey, but why would the planet react to day and night so severely?
I doubt, that the Dark Side means death. Destruction perhaps, but the concept of Mortis switching surroundings to life and death due to day and night is not convincing. It is also as if it were shown from the point of view of the Light Side.
The visual appearance of the Father, the Son and the Daughter is also something what I wouldn't expect from such creatures. While the Father looks more like a classic wizard, a magician, the Daughter looks more like a dancer of some sort. She wears clothes, which do not reveal her Light Side allegiance, but rather show, that she is a frequent visitor of some sort of a banquet on a Core Worlds planet. The Son is probably the one, who looks more appropriately to the situation And I even like the voice-acting here.
But the simpler clothes of the "deities" are, the better and more convincing they look. I this way, the priestesses in the Yoda arc look far better, and it's not possible to define their species.
I think, the Father would look much better if he looked as Vigil AI on Ilos in Mass Effect 1. He could of course switch his appearance to a humanoid form.