About hairstyles, they probably already added new hairstyles since we can actually see them on the trailers. New hairstyles mods will not work because that kind of mod need an ESP file to actually put the hair in game, so they will need to be converted.
About body replacers: I have no idea how many new armors they added, and how many of them show skin. If the body replacer you want to use has an ESP file, most likely it will not work with Enderal unless is converted. For female body replacers is a bit weirder I think, because some of them require custom skeletons if I'm not wrong, so probably most of them will not work without conversion (maybe, I may be very wrong about this).
About face textures, they should work without problems, since most of them are just texture replacers, unless they use an ESP file.
But for your first game in Enderal, I suggest you to play "vanilla", just to experience it the way they planned you to do it. Then we mod the hell out of this motherf@#]@er!!