I don’t like this idea very much at all, and I can’t say I particularly agree with it in any real way. That isn’t to say it’s wrong, or that I want some hidden implication that it’s intended as a slight against OP to manifest. On both accounts, it is not.
This is an idea that is fostered somewhat in the lore since Legion, and is coincidentally one of the reasons I do not like that expansion nearly as much as most people do. Light and Shadow are moral absolutes, objective manifestations of Pure Good and Pure Evil. They cannot exist in reality, but they do influence it and everything is dictated by different admixtures of these absolute forces to create nuance and gray areas.
Compassion. Respect. Tenacity. These are the Three Virtues of the Church of Holy Light and, in the disposition of every Paladin we’ve seen written before Legion are emphasized in their conduct and bearing. Even the Scarlet Crusade and Argent Dawn, organizations ostensibly decried as heretical to the Church, still adhered in a manner to the Three. Some may have prioritized others over another when the philosophy of moral hierarchies came into question, but they were always considered in the running when it came to using it as a way to dictate the “right” course of action.
This interpretation was seen as valid enough that the Draenei, guided by one of the oldest creatures known to existence that bore unquestionable benevolent prescience, adopted it for their own Vindicators use. This is all foundational to what, in my eyes MADE the Scarlet Crusade so interesting. I want to emphasize the past tense of that statement as well.
The Scarlets genuinely believed in the righteousness of their course. They were extremely successful in their efforts, at the very gates of almost literal hell-on-earth they were able to win straight up fights while taking and holding territory. Utterly unprecedented victories against a seemingly implacable and unending evil. They could and should have been a beacon in the darkness against the dying of the light.
Instead it was all a deception, a lie, a manipulation by an agent of an extension of pure evil actively using the better inclinations of good people to render them mad with paranoia and an unending spiral of chasing perfect purity. If we take away that tragedy, the brutality of manipulation, what do we have except a Silver Hand that is arbitrarily dictated to be the bad guys? Blood Knights without their siphoning of a font of power. Sunwalkers without their veneration of the Sun as a manifestation of divine benevolence.
Heroism borne of deceit leading to magnificent tragedy is the backbone of what made this faction extraordinarily unique and interesting. With the revelation of what it was, it became a hollow shell that didn’t need to exist any longer. Actively removing that core from what they were only retroactively degrades something just a little bit further that is already unfortunately a dozen or so years past a death certificate narratively earned.