Doubt this is going to happen due to engine / system limitations.
The way the engine is set up at the moment, each race gets 1 customizable feature (besides hair). Norn and Humans get facial hair (not sure what females of those races get, honestly… never made a female of either and don’t intend to), Asura get ears, Sylvari get ears, and Charr get horns. It would require a system change to allow a second customization option per race in order to add something like facial hair for Asura. Possible, but probably not the kind of change they’d want to focus on.
Unless said facial hair was tied to specific faces only. Sylvari have some facial “hair” (and by that I mean stuff like branch or spike beards) tied to specific faces, so that could certainly be done for Asura as well. But the hair would be part of the face (so to get it you’d have to choose that specific face) and not customizable at all beyond minor effects from some of the sliders. That might not be exactly what you’re looking for though, sounds like you want full customization.
I’d like to see the next back of Asura faces incorporate some facial hair. Honestly, the last batch of new faces weren’t all that interesting for Asura (at least I didn’t think so) so adding some facial hair to them would be a nice way to differentiate them a bit more.
As for scars and tattoos… same deal really. They could make them part of the specific faces, but having them as standalone customization options is probably not realistic. Though they have released a couple of tattoo looking face masks in the Gem Store recently, so there’s that. Probably not something you’d want considering you don’t want to spend money and those are quite expensive, but something to look at in any case.
