Apologies for that, I'll explain more about what the issue with the tritanopia option:

https://imgur.com/gallery/CnhNV7D (not mine or my static members pictures, these were found online)

My static member points towards this as an example of what the tritanopia option does for them. Everything gets incredibly saturated and looks intensely bright in the filtered version and on top of this, it turns greens into very bright reds. Because of this, it makes flashy effects like AOEs incredibly bright and straining on the eyes. In the pictures provided, you can see how bright even greys are.

As well as this, when filtered, it removes smooth gradient colour flow, it turns them into layers instead. For example here, if you look at the ocean, the blue smoothly transitions from one blue to the other where as in the filtered version, you can see that the red does not do the same, making it look jagged and straining to the eyes, especially in motion.

You may be thinking "why not turn down the slider if its too bright and harsh?", then the issue becomes that the filter does nothing for them at 0-70% and very little for them at 70%+. The saturation, is indeed a bit better when turned lower however it then leaves the issue of not being able to see the colours or, alternatively, it makes the colours that they can see blend into each other .

So at 100%, the saturation is so high and blinding that playing for a prolonged period of time ends up giving migraines and eye strain, and anything else below that just makes it so the colours blend into each other completely nullifying the attempt the option is trying to provide.

I am unable to give any proper suggestions on how to fix the tritanopia issue outside of the ones I mentioned in my original post, which just adds more options for players struggling with eye strain or similar issues. I am not an optician so I would be unable to delve into the issues of the filter and unfortunately my static member does not know how to fix the issues either. I'm not saying that this filter does not work for every person, but if they are unable to do something about the present issues with the filter, then more options to handle effects for the players legitimately would help exponentially.

If you have any other questions, please let me know and I'll try explain as best as I can. My intent is not to spread hate, but to raise my voice about an ongoing issue regarding the inaccessibility currently rampant in FFXIV's options.