I just can't help feeling that Solas taking Lavellan's vallaslin and then leaving them is so cruel. I know he doesn't mean to be cruel. I know he doesn't even mean to do it like that; he wants to share the truth about himself, and he just can't, and it's that realization that pushes him to end the relationship, because of how close he comes to telling everything to this person he loves. I know that he loves Lavellan and wants to share just one piece of the truth, even if he can't share all of it.
He sees right away how much the revelation about the origins of the blood writing has hurt Lavellan. And if Lavellan pushes back on the idea of removing them, he drops it immediately. He never forces the issue.
But it's still such a sudden decision for Lavellan to make, after such a painful revelation. And what if they do end up regretting it? What's going to happen if they return to their clan, or try to make contact with another if Clan Lavellan has been lost? How will they begin to explain this to their fellow Dalish elves (keeping in mind that they don't yet know who Solas is)?
"I met a lone elven apostate, and it turns out he's a Dreamer, and he told me that one of our most sacred traditions is actually a mark of slavery. And I believed him. And I let him remove my vallaslin."
I think the decision might be easier for Lavellan whose clan is still alive and well, if they know they still have a home and a family to return to. For a Lavellan who has lost everything, their home, their family and friends, who has probably had to fight to maintain their identity and their beliefs in the Inquisition even if they've also made friends and found community--the choice is heartwrenching.
In taking the vallaslin, Solas takes from Lavellan the most obvious sign of Dalish identity, community, culture, and tradition. And then he breaks up with them. Lavellan can't even say "I've lost everything but at least I have you."
Every time I see gifs or videos of that scene, of Solas gently saying, "Ar lasa mala revas," literally I give you your freedom, it just breaks my heart, because I know he means it. I know he wants to give them that.
But what kind of freedom is it? And at what cost?