Just like that Denise is gone and so are the idols. Denise was the running gag of the season if you didn't pick up on it. She is the only player to always vote against whoever was voted out. (This time was debatable since if Vinnie didn't play the idol he would have went) She is also along with Kris the only person to never recieve a vote against her.
The reason I made her go like this was because I wanted her to leave how she played the game, unnoticed, (The Purple Rock may seem kinda cheap, but it is a real twist in the show). Also I wondered what would happen if both Idols were played on the same night
This may seem weird as to why Ellise gave Kris Immunity, but it was to try and protect her from the rocks, since she knew she was playing her idol.