he's articulate and able to point out all the hypocrisy

I mean, that's literally the best thing a VP could do. Be a foil to cover the weaknesses that the president has.

But Vance's strength is that he is half Trump's age and far more in touch with the actual problems in society instead of some politician whose been in the system too long. Which means, unlike 95% of the picks, his existence puts further assassinations attempts on Trump as a net negative for TPTB because they'd end up with someone far worse for them.