Given the prequels I don't think they can oversell the practical FX enough.
They hyped up Kingdom of the Crystal Skull using practical FX before production, that basically went away when they started making the movie. The same thing happened with them talking up how Kingdom of the Crystal Skull would play like a '50s sci-fi film, but then it just ended up being Temple of Doom and Last Crusade with aliens replacing religious artifacts. Not that they didn't use practical FX, but they used a lot more CGI (and in some really big stupid ways) than they originally talked about.