TL;DR: They added like, 20 filters, ranging from the standard various hue-shifts, to more unique things like “high contrast silhouettes” and “vertical stripes on one player, horizontal ones on the other”. Some people flicked through them and said “wow some of these are so crazy it makes me sick to look at”. Game journo picks it up and runs with it.
If an optional accessibility filter makes you sick, don’t turn it on! There’s no rule that says you have to! Most people will never see these in the first place, and even if you need one, pick one of the ones that doesn’t hurt you!