Can you explain how Rossiel's threat works against her ability? She does have 8 threat (lowest available excepting Hobbits and Bifur). I can see her HP working against trying to use her defensively, but she has great stats for a quester.
I'll elaborate a bit. 8 threat is relatively low, but if you want to start in secrecy for Out Of the Wild then it only leaves you 12 threat to work with, which does not leave you with many options. Even fewer if you want to stay in secrecy for a round or two. I realize Rossiel does not require OotW, but the other ways to get stuff in the victory display require you to explore/combat, which Rossiel isn't good at until after you've done it. To me this is a bit of a Catch 22.
Additionally, the bonuses you end up getting are pretty mediocre in my opinion. It takes a decent amount of effort to get a conditional +2 def/+2 WP. I can think of many other ways of getting the same buff, unconditionally, with the same or less effort. If Rossiel's ability had instead been something much more unique, like "When Rossiel is questing, and the active location shares a trait with a location in the victory display, ignore surge", I think I'd be more inclined to actually play her.
I can't believe Rossiel is giving Glorfindel a run for his money. He's still awesome and she is most certainly not.
Glorfindel is boring and overly ubiquitous. Rossiel is not.
Boring but good vs interesting but bad. I put Rossiel in the same category as Lore Faramir - their own stats (notably their high threat) actively work against their own ability. I think they both could've been more solid heroes if they were more streamlined. Luckily, the fun part about Rossiel (the victory display mechanic) does not require her at all.
8 threat is considered high now?
I realise this is contextual, 8 is higher than ideal if you're looking for Secrecy to play Out of the Wild cheaply, but out of context, 8 is not high.
As it happens, I think I would also put Rossiel together with Lore Faramir - pure power-wise they're both low tier heroes but they're fun, and when people complain that they don't work I feel like those people probably haven't tried hard enough (or maybe are using them in the wrong context, e.g. not everything works in solo).
I did challenge myself to make a functional solo deck with Rossiel, and was happy with the deck's strength (completed Fate of Numenor and Nightmare Flight to the Ford). It didn't make me like Rossiel though, because the whole time I felt like it would be more powerful if I traded Rossiel out for someone else, like Lore Denethor.

