I would like to address this part of your post separately, as I think it may reveal some deper trinitarian and christological gaps between the Apostolic Church and Protestant communities.
If you had said that the "Son is a different persona" I would not be writing this. As you know, the Greek word hypostasis does not mean a "person" even thoughsome dictionaries may translate it as such. It really means something much closer to a persona, a projected character.
The "English" word "persona" is a Latin word transpant. It means the same thing it means in Latin! It is not equivalent to the English derivative , although, as mentioned earlier, some dictionaries will say so.
A persona is a perceived, projected character of the author or projected by an actor of a person being played.
In Greek "that which stand beneath" (hypostasis) is neither a "person" nor "substance." It is something akin to a perceived individual reality.
In the divine management of His salvation, God appears to us in three distinct hypostases. But they are one and the same God. God is simple and indivisible. God is a monad.
It is impossible to separate one from the other, Son form the Father, Holy Sopirit from the other two personae of God.
By treating them as "persons" of the same (divine) essence, or nature, we are intorducing tritheism, a multi-God trinity which is taught by the LDS cult.
This is no different than saying Kolo you and Mark are three persons of the same human nature or essence. Only if Kolo you and Mark were one and the same person behind these screen names could we say that all these screen names are not onyl separate entities on screen, but one and the same author behind it!
To us God revealed Himself as the Holy Trinity: in three distinct Hypostases. But they are all the same God.
I have no problem with that. We do the best we can in the English to describe what can be a difficult concept. I'm not sure of what you mean about "persona" as a projection, as opposed to Christ the person. Christ really really truly was and IS God. I do not think of Christ as being 1/3 of God out on a mission trip. He's all of God.
In Greek "that which stand beneath" (hypostasis) is neither a "person" nor "substance." It is something akin to a perceived individual reality.
That just sounds like trying to make something that is real, unreal. Christ's divinity is very real.
By treating them as "persons" of the same (divine) essence, or nature, we are introducing tritheism, a multi-God trinity which is taught by the LDS cult.
I don't see it that way. They are three persons in revelation, but one God. Distinct "personhood" is what allows us to attempt to explain how Jesus prayed to the Father, etc.
This is no different than saying Kolo you and Mark are three persons of the same human nature or essence.
No, it's not like that at all. Our human created existence is not like God's uncreated existence. We can't compare them.