The refurbishments did not include adding any kind of teen center. Ryan, will you be 18 before the cruise starts? Their teen group is for ages 13-17. If you are 18, you are lumped in with the adults. Since you are sailing around Christmas, there is bound to be others your age on the cruise and I am sure you will find your own "hang-out".
They will have a schedule of youth activites for your son to keep him busy each day. They do have a children's playroom, but there is no designated area for teens.