Hey :) Thanks for your answers!
I'm pretty new to PFS, but I got the impression that everyone (me included) likes the faction missions. So - why they aren't valid anymore? But that's another discussion, I guess...
I like the idea to let the Tik Taan flee into the other halls, if the PCs enter the Great Hall first.
But even more I like the idea to have the Tik Taan in different rooms in the first place (maybe one in the Great Hall, one in the offices and one in the restroom). This would provide the feeling of meaningful exploration in the "post faction mission times".
But I'm not allowed to do this in a PFS game, right?