Tastes differ, I suppose… I’m personally not much into dead women, but, I guess, de gustibus non disputandum est.
I’m not sure if Tyrande is racially fit for a banshee (that was a thing during Arthas’s invasion of Quel’Thalas and had to do with high elves; incidentally, Tyrande had had more that ten thousand years before that event, so it’s questionable how ‘this fate… was always a danger’, as per her remark in the collection manager) either, or this makes much sense at all. Not that I’m a very big fan of Tyrande or anything, with her ‘friendzoning’ Illidan like that and Malfurion somehow getting those horns (make what you will of it), but I suppose she’s fine to me as is.
I haven’t done any of the event-specific quests on purpose (apart from occasional dailies that just get completed along the way), since the rewards don’t seem that enticing to me, but at this rate, it looks like I might get her as well. Another free portrait for the collection, I guess…
As for Sylvanas, I haven’t bought her even with excess gold, because, first, I don’t care for that Mary Sue (in the banshee form, that is), second, there is Alleria, who is special to me as one of the first alternate heroes in the game (not to mention that she’s arguably pretty and not dead), and also some Rexxar portraits (including that Warsong one which I bought with gold for nostalgic purposes), as well as those free ones for Tavish from another event, so I don’t see much practical use for it, either. For instance, I haven’t bought some portraits from the ‘Book of Heroes’ series with gold, even if I liked the characters, in cases where the portraits were of low quality or unlikely to be used — so why would I acquire ones for the characters I don’t like or want?