Stop casting people like Jenn and Lawon who we'll just know literally that they won't give much effort to the game.
Stop casting people like Shane and Ashley who DON'T EVEN KNOW how the game works. Well maybe Shane will do good in Survivor and Ashley in some kind of dating show.
Stop bringing past houseguets. Well at least don't mix them with the newcasts. Either all returning or all newbies.
You can bring back somekind of players we might want to see in the game going further, that everyone wonders how would they do if they made it far :
Cassi,Dominic,Jodi,JoJo,Wil.
Cast more houseguests like Ian,Frank,Britney,or Shelly.