I don't think hate is enough to make everyone vote off Heather, I mean, she's already been shaved and she hasn't done anything nasty this season, so she'll probably be able to sneak under the radar for a few more episodes.
Gwen needs at least 2 more episodes, one to show her dealing with the departure of her ex, and another to make an episode out of the cold she's developing.
I personally don't like Leshawna's plot very much, defending Harold. I mean, she broke up with him and has shot down all his advances this season, so I find that plot kind of uninspired. I'd hope to see her go next, but the writers probably have something in store for her.
DJ's safe for a while; until the plot with him and Chef gets resolved.
Lindsay is good for ratings (Real world and cartoon world)
Beth and Just are clearly going to have a couple more episodes devoted to them. I pray for an episode where Beth stands up to Justin and knocks him off his high horse.
Duncan will definitely be around long enough to see Courtney's return, and Harold will undoubtedly be part of the plot.
And Owen's good for comic relief, but not much else. I'd pick him, but I really doubt that they'll send a third consecutive Grip home, because that would make the Gaffers have twice as many players at them.
Verdict: Gwen and Harold are the only Gaffers who put up with Leshawna's many quirks. It seems quite possible that she'll get into a fight with one of the two, which will turn the vote against her.