Yea I had the same problem, you just can't evacuate Edoras until much later it seems, and I'm still pretty clueless about the reason.
Don't remember on my first character, but on my second one, I did this quest as one of the last, after I was done with the epic and all other regions including westfold. I checked a few times inbetween, at least after Eastfold and Broadacres, but still couldn't talk to Éowyn.
Ullr_of_Aesir believes that you need to do all Middlemead and Underarrow quests (including the Orc Cave near Dunarrow).
See thread: https://www.lotro.com/forums/showthr...ic-line-quests
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