The most shocking thing would be that he revealed that Joyboy was the first pirate and fought the WG, but even during that part, Vegapunk refuses to paint any side as evil and tries to paint them both as fighting for their own ideals, and the common view of pirates among civilians in the OP world is that they're all evil, so naturally people are probably going to assume Joyboy was the bad one. So you're still right, Vegapunk's message had nothing that actually made the WG look bad, and them doing this over the top arrival just to get nerfed by 800 year old rope haki feels completely pointless. Most of the message doesn't make the WG look bad and the most nerve wracking thing it was do "THE ONE PIECE IS REAL" again but with way less impact than Whitebeard.
We will see what effects this will have down the line, maybe more countries will rebel and join the revolutionary army? Idk.