Hi. This is an anon comment because I'm not registered on IJ.
It would be a shame if the game died because I'm always looking for places to play Who-verse characters.
Perhaps you could consider a reboot effect- (Time reversal maybe, such as in LotTL?) whereby continuing characters could retain their memories, or not, of the game thus far, and clear the slate of anyone else - perhaps by limiting applications to existing players for the first couple of weeks.
Then you have a fresh start, without old plot hanging over, but keeping a level of continuity for the others.
And throw a shout out to the LJ and IJ Who comms for new members.