Catriona Balfe was so disappointing. The top half kept coming up and then I'd see the bloody mermaid skirt thing and just go Ugh. Frankly tuxedo trousers or something would have been so much different. Also her lipstick clashed with her top! 
I don't know who Zazie Beetz is but she looked great.
Contraversially, I loved the top half of Laura Dern's dress but thought the skirt was awful. Completely unflattering and pointless. The top half felt a bit like a 20s flapper dress then it all just disintegrated into badly fitting prom dress.
Olivia Coleman, bless her, really doesn't get red carpet dressing does she? She looks like she had her velour trackies converted for the occasion.
The problem with some strapless/one shoulder dresses is that there's a real risk of some weird skin overhang, even on the slimmest of women. Regina King had some in some pictures. And in the pictures of Renee I've seen she's holding her arm out in such a way that I can't help thinking she's terrified that if she drops it, she'll have hanging skin.... Also how does she cope with one long sleeve and one bare arm? That would drive me crazy!?
Penelope Cruz might be my best dressed I think. Just a tiny bit quirky without being too hard core. I also loved Charlize. Scarlett could make a sack look good.
Sandra Oh's dress was surprisingly fun.