Isn't funny how at 22 she's an "older" girl, lol. Anyway, I agree with your assesment and I think it's in part because she's not burnt out sort of speak. Unlike say someone like Jessica Stam or Sasha, Snejana was never really someone who had an editorial in a magazine in any given month. So in a way, she's got more to offer than what we got to see so far. This is in no way to disrespect those two models or anyone else who's lucky enough to have an ed every month, I'd kill for Snejana to be one of those girls. But there's only so many poses/facial expressions a model can give and I feel like at some point you just have go start reusing.
Not sure if I'm explaining it well, but I tried.