If Liz goes up, James can make deal with John and Steve to evict her. It shouldn't be that hard. LIZ HAS A TWIN AND A SHOWMANCE
Vanessa putting up Liz will maintain the bridges with her Steve John alliance. Which she absolutely needs if she wants to win the game. And it weakens the Austwins-Goblins alliance. It splits Julia and Austin up and Vanessa can make a deal with Julia and Austin will be a sitting duck. Easy target for everyone on double evictiom