I think the Canonist and even Qalasheen aspects of the server still remain extremely important cultural aspects that are bound to history (like Horen and multiple other human figures integral to the lore, let alone the alliance between Pontiff James II and Aenguls).
The Scrolls themselves are, fun fact, are close enough to some parts of the actual creation lore of LOTC (albeit not exact, and with their own cultural biases and dogmas, especially when interpreted). Yes, LOTC's universe is tied to an all-powerful entity in lore - and the Scrolls do get some aspects of early aegis history quite correct (although that doesn't mean that canonists have the "true" religion so to speak - and that's what makes it so fun IMO - flawed and imperfect, even extreme beliefs can lead to a lot of interesting narratives). Thusly, Canonism is pretty integral to LOTC for me, despite not rping one. It has literally shaped and influenced the server in many ways, started wars, and ended them.
I believe that in any sort of adaptation, canonism would have to be featured in some aspect especially as it has to do with standard humans. If you remove the cross symbology from Canonism, you effectively get a pretty neat religion that does follow closely in some regards to aspects of the Christian faith, but falls pretty neatly into its own fantasy religion with a crazy amount of depth besides "muh christian larp". Without canonism you'd lose a lot of the politics, reasoning, and spirituality integral to most human history - including wars, empires, and so on. Its inseparable. But all that also depends on the story you want to tell - but canonism, like most other religions on the server, always end up being propped up or relevant in some way, and are in this case inescapable.