If you encounter Gytha in the Frostwood after discovering Alissa’s whereabouts (and before leaving for Dracia), you can now confront her more properly. Might be for her own good that she not stay free…
I've encountered her after speaking to Livernon but before actually embarking on the quest and her interactions are exactly the same as they were before, there are no additional options or changes to dialogue. My dungeon has been built as well, so I'm confused as to what this patch note is referring to?