A lot of the main issues with SCH are not being addressed with Endwalker

[Shurrikhan]

Tell me, is getting rid of Ruminate stacks for CT any different than getting rid of the fairy for Dissipation when the ultimate thing is that they give you more Aetherflow, which seems to be the crux of your argument.

One sacrifices significant healing over time and access to Fey Illumination, Whispering Dawn, Fey Blessing, and fairy tether.

The other sacrifices an instant-cast Broil that may carry a single-target damage-down debuff of at best 20% uptime.

See why sacrificing the one for Aetherflow would be mildly "situational"... but the other's sacrifice would amount to awkward-but-obligatory hoop jumping, since the relative cost is next to nil?

Virus was an old cross class ability that SCH/SMN used to have that would apply a damage down debuff to the target for 10s but made the target immune to the status effect for 60s after it was finished.

I'm aware, though admittedly I'd forgotten that it also affected Intelligence on ACN/SCH/SMN (and only Strength and Dexterity for others), unlike the later Addle. I still don't much care for having to look at the target's buffs to track when you can next spend your instant-cast Broils (Ruminate) for their full effect.