Kurotowa
Legend
I'd caution that we may see some small tweaks to them. For example, since Monk is being revised to lower Discipline Point costs, the Warrior of Mercy should be included in that. But broadly, yes, as your list shows the TCE subclasses all seem to be exempt from full UA evaluation. Any changes will be small ones to integrate them into the updated base class, not large scale revisions.Strictly speaking, that's not true. The Oath of Glory was in Tasha's and is getting an update, but it also was a straight reprint from Theros so it didn't get a round of playtest during the Tasha era. But to your point; no subclass designed for Tasha's seems to be getting revised.