Been a long time lurker of this board (I've seen all the user drama) but finally made an account to answer your question since I've been a longtime Mannfan for almost 4 years.Chris will be extending his run through at least spring from his tweets or maybe summer since Katie Travis said in a interview she's contracted through D.C. Chris' wife Laura was just casted as a swing last month and started her performances last week.
I am not a fan of his work or Katie's for that matter. Probably the worst principal casting I have even seen when it comes to Phantom. Was hoping to fly out to see it once Mann as gone. Neither one of them would make it on Broadway but on tour Cameron Mackintosh can skimp on quality.
Even if the actors were great they'd still be performing in this bastardization of the original production. This staging is so awful they might as well cast lousy actors to go along with the lousy design and direction.