As we have persuade and Intimidate, and it's been like that for a good while, why not add some more with new content? maybe something related to thievery, or something related to some kind of mind control, to give a few ideas. I think they're agreat addition to have and can add some layers of depth to some dialogue
Those skills are pretty much a waste of Skill Points imho, all they do is sort of spare you some extra time fetching something or fighting something, which you want to do anyway if your character is leveling since its XP.