Well they are what they are. Zealot / Unionist / Cyberknight - one of three subcategories.
Officially there could be a huge diversification within that single subcategory - and realistically should be, as not every Khanid Zealot is a member of the 'cult of Tetramon (either lay person or otherwise - and besides I think someone had pointed out that they may have been annihilated out of the lore anyway, I don't remember atm).
Basically you have space for diversfication from a monotheism that isn't *too* diversified, but possibly at times enough that it could make someone in a Theology Council nervous (if it were in Empire).
We get into the thoughts of 'religious diversity in Empire' itself at that point, as we ae RPers have decided that, yes, a priest in a huge megacity Basicilica is going to be a little different in how they present thing than one in a backwater planet agrarian compound or something, but at the end of the day, both of those priests would refer to the Empire approved 'flavor of the decade' cliff notes of Scripture Empire/Empress is pulling on at the time.
Then you have this full body of literature in the Kingdom (the full body of the Scriptures gathered by the cult of Tetramon for it's preservation and whatnot, I'm sure there are people who can correct me and explain bits of this better) and as I have taken it, also the comprehension from that same scripture and indeed all of Amarr history (because insightfulness) that the Scriptures are a living document "written daily by living people" who will not know (nor can they) the impact of their words and actions on the future. I usually play Arista on those lines in how she carries herself - that basically any of the faithful are potentially scripture-quotable for the future.
Her closest real life comparison is Kahlil Gibran - basically, a religious mystic, which they tend to be misunderstood even today. "How can you be this but then make up your own stuff?"
In my youth I was told that in a certain city every one lived according to the Scriptures.
And I said, "I will seek that city and the blessedness thereof." And it was far. And I made great provision for my journey. And after forty-days I beheld the city and on the forty-first day I entered into it.
And lo! the whole company of the inhabitants had each but a single eye and but one hand. And I was astonished and said to myself, "Shall they of this so holy city have but one eye and one hand?"
Then I saw that they too were astonished, for they were marvelling greatly at my two hands and my two eyes. And as they were speaking together I inquired of them saying, "Is this indeed the Blessed City, where each man lives according to the Scriptures?" And they said, "Yes, this is that city."
"And what," said I, "hath befallen you, and where are your right eyes and your right hands?"
And all the people were moved. And they said, "Come thou and see."
And they took me to the temple in the midst of the city. And in the temple I saw a heap of hands and eyes. All withered. Then said I, "Alas! what conqueror hath committed this cruelty upon you?"
And there went a murmur amongst them. And one of their elders stood forth and said, "This doing is of ourselves. God hath made us conquerors over the evil that was in us."
And he led me to a high altar, and all the people followed. And he showed me above the altar an inscription graven, and I read:
"If thy right eye offend thee, pluck it out and cast it from thee; for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell. And if thy right hand offend thee, cut if off and cast it from thee; for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell."
Then I understood. And I turned about to all the people and cried, "Hath no man or woman among you two eyes or two hands?"
And they answered me saying, "No, not one. There is none whole save such as are yet too young to read the Scripture and to understand its commandment."
And when we had come out of the temple, I straightway left that Blessed City; for I was not too young, and I could read the scripture.
I notice you seem to be lumping Zealots in with Unionists in how your'e writing that - and they're not, not really.
I have never fleshed the thought out enough to make any sort of corrections to that, save that there are surely zealots in the Kingdom who do not pupport the Unionists poilitical movements, specifically because it is the Theology Council which would be the doom of them were they re-encapsulated back into the fold of Empire. That above Gibran parable from 'The Madman' explains it nicely.