As far as I know only charisma is used in Fallout 4. Talking about Fallout 3 and New Vegas, I don't know what I find better. The percentage based skill checks in Fallout 3, or the absolute skill level based checks that even gives you different dialog lines when not meeting the requirement or doing so. Pretty funny at times. Another thing would be cool: like in Pillars of Eternity or Tyranny, giving you the option to turn that meta info off, so basically displaying the specific dialog line without the prefix [Medicine, Strength, etc.] because it's often a no-brainer to take these because that reaches your goal (a thing I liked in Vampire: Bloodlines, where intimidating answers could also lead to combat and not only peaceful resolve of your problem).
That being said, I think there is much potential for Fallout 4 to be a better RPG without sacrificing it's established features (I love the VATS mode and the dialog camera and system that is more natural and less mechanical because you can still move, aren't bonded and could leave without clicking a 'goodbye' option).
It's an interesting idea to turn that info off, but I actually think that moves you further away from the tabletop RPG kind of experience, where after you say something the GM would expect you to roll a specific skill check. That's kind of what I really liked about the base version of pillars and the skill prompts in fallout New Vegas. In Fallout 4 there aren't any interesting dialogue choices because there's no corresponding skill that's been increased, just charisma.
Off topic, been playing again, just played far harbor for the first time and really enjoyed it.