Originally Posted by
Fleugen
I'm only spouting as much headcanon as you. It's never mentioned what happens to the imprisoned sunreavers. We know the Violet Hold is broken into, yet again, by Legion times, and we know several Blood Elves involved in the purge escaped. (Some during the questing, but unclear how many or exactly who.)
So you don't have evidence to believe they're still imprisoned, and I don't have evidence to believe they're not - But one makes more sense given where the story has gone. When the Sunreavers were officially readmitted to the Kirin Tor, it no longer makes sense that they would imprison Sunreavers who didn't necessarily do anything wrong.
Well for one, she wasn't supporting the Alliance at the time of the Purge because she couldn't use Theramore to support them given the state of Theramore at the time of the Purge. And she wasn't using Dalaran as an Alliance base - It was a neutral base, clearly, given the potential for Horde members to use it for their own gain.
For two, Goblins have always much-more heavily supported the Horde, and yet until Cataclysm remained neutral. (Even after if we're talking the Steamwheedle, but we see some of them helping the Horde in BfA so who knows)
For three, Jaina's own neutrality was ABSOLUTELY neutral even as she allowed Theramore to be used as a base. She was even neutral enough to be talked down from flooding Orgrimmar after Garrosh blew up Theramore. A city for a city would have been pretty reasonable - But she let's Garrosh get away with it.
For four, she was an Alliance member at the time. She led Theramore as neutrally as she could, but as much as she liked it, Theramore wasn't HER city, it was an ALLIANCE city which she watched over. They could use it as a base without her approval, because they built the base. It wasn't her base that they used - It was their base that she oversaw.