Besides soul magic (which I think should be tied into the mage guild) all the world skill lines are hidden. Which is fine but as a new player it isn't obvious these even exist. Of course with the port and the many sources of knowledge on the internet it would only take a little bit to research. I still think there should be some form of a hint in the game. Since you are adjusting the tutorial why not have an NPC who was captured drop hints about the ledgemain skill? Have someone transform into a werewolf in view that you can speak directly to or another observer who comments on it? Maybe have an NPC along the exit path in stage 4 vampirism who explain a little about how they came to be in that state?