I must say, the lack of skooma in elder scrolls online is disheartening. I, a skooma fiend, miss the ability to consume it on a cosmic scale. Granted, there is a quest or two that deals with it (khenarthis roost), I sure do miss finding that sweet elixir in-game. I once looked it up during my oblivion days ('05), found out the ingredients and started creating it. Granted, it was basically a poison... more so than normal, but I still enjoyed it.
This isn't a call to add it, just my Ted talk.