I do hate Josie, too, but I kind of see the point of eliminating Kristin. She was suppose to be the boss and she should have leaned on Josie from the beginning. From the pint where she was supposed to be cooking off the bones and wasn't. She should have been yelling at her to get it done. Things may have gone very differently if they had seen she was pushing her and she didn't do what she was supposed to, and that Kristin was forced to take over to get the service out on time. Had she been able to say, "I nagged and nagged her to do x, y, z and she still didn't do it, so I did what I had to do to get my restaurant open." Josie probably would have gone. Kristin was right, though, as the leader she should have been more proactive.
Josie knew what she was doing from the beginning, though. She sabotaged her, but it will come back to haunt because everyone else loved Kristin and hates Josie. They will be doing everything in their power to get rid of her.