Tom Sandoval is happy to be the center of attention on "House of Villains" Season 3 with "Survivor" star Tyson Apostol ... but he also had plenty to say about his old stomping grounds at "Vanderpump Rules" and how it can be as successful as the OG…

Vanderpump Rules alum Tom Sandoval joins reality stars on House of Villains, aiming to change his 'villain' image by bringing positive energy and forming alliances.

Longtime "Vanderpump Rules" fans may still be upset the cast they grew to love over the course of a decade is gone ... but, clearly the newbies are doing something right -- because the show's already been renewed! Production sources tell TMZ ...…