I would rather have full facial customization before anything else anyway, mods can't do that, they also only give more pre sets.
That would depend partly on what Larian come up with in terms 'full modding support'. Modded full facial customisation exists for other games.
This is the 10 year old Racemenu for Skyrim LE
https://www.nexusmods.com/skyrim/mods/29624?tab=imagesThere are other mods which add to that mod.
My main point was that there is no reason it cannot be a feature of the game as most other games have managed to do it for many years. My secondary point was that modders seem to be able to do it easily enough.