It's all just "okay", nothing really stands out to me like for many of the other races that have been shown off, for them my reaction to some of their options was "Wow, that's really cool!", it's all very generic and throwaway which seems strange to me as there's so much you could offer for Trolls.
Hair: Dreads, more options of braids for both genders, big bushy manes of hair. So many good designs in this thread alone. What we got for males resembles existing hair styles, just with highlights, females hair is a bit better.
Ears: Elves and Goblins got this treatment or more ear variety, where's the same for Trolls? Maybe we want some big ol' Vol'jin bat like ears.
Beards: Come on, art of Trolls has depicted them with beards since the early days, this is something I know has been asked for for years. I still have video saved of a RP friend's question about players getting raised at Blizzcon 2010.
Tattoos/Paint: Mostly very generic. How about designs based on the different Loa of the Darkspear Trolls, options of designs mimicing Spiders, Tigers, Raptors or Bats.
Jewelry: Necklaces with bone, feathers, voodoo dolls and other things related to Trolls and Voodoo, or even tusk jewelry of these types. Lobe gauges even!
Time and time again I feel like the Blizzard Art team hasn't got a clue about Trolls, forgetting they have fur to the point it's arguably not canon anymore, forgetting what part of the jaw the tusks connect to, constantly forgetting in recent times that Trolls have a third toe on their heel, and so far the lack of any customization that really stands out and as I described in my post prior; Impactful.