I hope they add a new character slot for people who already have 8 characters they don't wish to change but make it Cathar only so people don't exploit it.
Um, exploit? Considering we are allowed to make whatever characters want (i.e. I can have 6 Warriors if that's my choice), there would be no exploit to be had if they gave us another character slot. Besides, not everyone wants to play a Cathar so what you propose is excluding those players from having another character slot to use.