Thank you for your care and concern brother John - I agree, there are many wonderful things about the LDS church, as there are many wonderful things within all religious traditions (if there was nothing there, no one would follow it!)
How do you come to terms with the teachings of outer darkness, and lower degrees of glory? Do you want ot become like g-d - to be worshiped, and to be higher than others? the degrees of glory truly does bother me.
I think there are "other sheep", more than one tribe, and hope to find the same degree of glory for all, and salvation for all, by the end.
I could never be happy knowing that other brothers and sisters were eternally damned in lower degrees of glory - could you ever be happy knowing others who were eternally stuck in outer darkness? It seems impossible to be both filled with love for all, and happy with an eternal caste system...
Please don't interpret my comments to be inflammatory. I have no intention of being rude, but I will get to my point and stay there, so that may "sound" rude.
I believe that your issues with the degrees of glory come from a reliance on opinion and theories rather than on actual doctrine.
For example, no where in the scriptures does it claim that the outcome of becoming like God the Father would result in any of us becoming objects of worship.
Neither do the scriptures claim that we would receive our own world and rule over it as God the Father has ruled over ours.
These and many other ideas have been theories and speculations talked about in the Church since the days of Joseph Smith, but none of them are actual doctrine.
All we know is that through the Atonement of the Lord Jesus Christ we can become like Him and God the Father.
The details of that revelation have not been revealed as the doctrine of the Church.
That being said, I wish to now share my personal opinion about outer darkness and the degrees of glory as you asked.
I honestly believe that God does not want to force any condition upon us. He has allowed us, from the very beginning of our existence (whenever that was) complete freedom.
We are free to choose what to do, where to go, what to care about, etc.
Therefore, if someone commits what is known as "the unpardonable sin", they will eventually be cast into Outer Darkness.
The reason for this being that, when a person is given the opportunity in this mortal life to receive all that the Father has, yet decides to reject it, they are displaying their desire to have no part nor portion of what the Father has.
Therefore the Father, in His mercy, has prepared a place for those of His children who want nothing to do with Him and He refers to that place as Outer Darkness.
Now, the name and the conditions of "Outer Darkness" might sound horrible to you and I, because we actually love God and want to be a part of everything and anything He has to offer, but to those who literally hate God and don't want any of His light in their existence, Outer Darkness is "just right" for them and I believe that they will eventually find contentment there, if not happiness.
It's crazy, I know, but I have come to understand this through personal experiences. There are things that people choose to do and places people choose to go to that boggle my mind, because I would never willingly do those things and go to those places, but these people make their choices and who am I to tell them that they should not be able to make that choice?
God loves us all, therefore, He gives to us exactly what we want to receive.
For those who will eventually enter into either the Telestial or Terrestrial Kingdoms (it is my understanding that most of God's children will be entering into the Celestial), they are receiving exactly that which they wanted.
Some of God's children simply would not be comfortable in the Celestial Kingdom, for whatever reason. Even though I cannot fathom the reasons that one might not want to enter there, I cannot take that choice away from them and I know that God does not want to take that choice away.
His entire Plan of Salvation, or Plan of Happiness, is founded on the principle of individual freedom and agency.
This is why I do not agree with your term "caste system" to describe the Kingdoms of Glory, because that implies that a condition is being "forced" on God's children, when it is my understanding that the exact opposite is true.
God allows His children to do as they wish and to go where they will go.
He will not force anyone into the Celestial Kingdom if they don't want to go there.
He will not force anyone to accept the responsibilities of becoming like Him if they don't want them.
Well, that's my belief in a nutshell. I'm willing to talk more about it if you want.
I encourage you to rely more on the scriptures and official doctrines of the Church rather than these speculations and theories.