I love my Figma Tracer, she came out really well but I also think that the glasses help here. With Widowmaker though, I am not confident about her face. From the pictures I would say that every fanart and even the chinese knock-off is looking closer to the original than the official figure. The form of the face, the expression, nothing is looking like Widow IMO. I might get her anyway, since Tracer needs her nemesis but I think I would only use the aiming face, because that's the only one coming close to character. I also hope Kahotan is giving us a back shot, I mean Widow is famous for her behind and that's the only thing they didn't show.
Regarding other characters:
The only two I really, really need is Mercy and yes Pharah! I just love Pharah, I even bought Figma Motoko (Arise) to have an "out-of-armor" body for her. I wish they would make her in her Anubis or Helix Security skin (even though I hate the later helmet) I just hope future Overwatch Figmas are coming closer to the likeness of the characters, it's not like there aren't various 3D-models avaible from Blizz themself.^^