(striving to avoid spoiler info for if/when the adventure is released for home play)
Devin, I hope you can understand and appreciate the IC reactions any non-elorii had/have to that whole string of events.
First off, if there was full disclosure about the 'eating elemental souls' aspect, that would have been helpful. But that aspect was a 'secret' being passed around between the elorii, and that in and of itself is not exactly something many characters may respect or respond well to. I find it ironic (and amusing) you claim to not want to participate in this 'alternate name' thing because of the impression it may leave, but you are fine with orchestrating volunteers for this other thing that will cost any other creature/race more than just its live by 'forgetting to share' some key information.
Alternately, in light of the elorii's end-goal objective (as a race), you should not be surprised that you getting up and making a surprise announcement might not be perceived by others as the truth, the whole truth, and nothing but the truth (which in fact it turned out to not be!).
Lastly, when the response to that ritual comes back to haunt our world, my character will expect the elorii involved will be in the front of the line to deal with it again and make their sacrifice. I am doubtful that is the last we've heard of that whole situation. Consequences for actions, and all that.....
And if/when some Coryani characters do something as dastardly, we'll deal with that, then. But I'm not accepting the "I know you are but what am I?!" distraction as a valid response