Front of the Line has been gone for months.
The current system (whatever it is they call it) allows you access to the Express Line with no ticket required, and you can use it as many times in a day as you want. The same system should be around in December except it will likely be limited to only once per day for each ride using your room key (you can still wait in the regular lines of course and you can also use your park ticket to get additional Express passes).