You read that wrong then. Making shadowheart tempest instead of trickery doesn't make her a non cleric.
I've already answered this, no, I really don't think I read that wrong:
Even though they say cleric in the blogpost I belive it is her subclass that is locked and respecing her into a different domain will have the same effect of breaking her quest.
Swen mentioned in a different interview that two companion subclasses are locked, and even though he didn't drop names at the time it was widely understood it is Shadowheart and Wyll. Also important to remember that Shar is the most evil deity in D&D...respecing Shadowheart into a domain of life or light would make zero sense...so screw around at your own risk.
