My opinion of Caryn was improved because of her integrity. I hope she lasts longer than Katie.
Tom would be very smart indeed to form a separate secret alliance with Caryn. He would have an easy time winning a million if he were up against her in front of the jury. Most of the women did not like Caryn from the get-go and especially after she would not form an alliance with them. If he could get Caryn and Ian to stick with him then he could choose Caryn to be in the final 2. At least that is the way I would like to see it play out.