This is interesting to me, my wife also dislikes Shan, but I like her and am low-key rooting for her (as much as anyone at this stage of the game, still feels really early). I think, at least to the viewers, she's very transparent as to when she's being evil (especially with the focus on the "up to mischief tune"), but to individuals in the game, I bet it's much less apparent how many shenanigans she is up to. I find it really surprising though that JD was soo trusting to give her his advantage not once, but twice, and shows how much trust she's gained. The interesting thing is, will Ricard start to distrust her seeing her cut down JD so easily.
Also, their tribe may continue to lose if there isn't some sort of merger soon, so it may be a moot point. My guess right now is a swap at 12 to two tribes of 6 with the merger coming fairly quickly after that. But might just go 3 right into the 12 person merger, we'll see.