Not sure John is exactly a big name boot, but I'm not surprised it was a contender. Got a bit mislead by the preview, from the episode itself it was obvious Daisy would stuff up who to play the idol for. Very unlikely they'd put the votes on her knowing she had the idol, playing it for herself was the worst choice to use the idol on.
Abbey wasn't a bad pick to eliminate for the contenders - from her edit she's not winning, and I wouldn't be surprised if she goes soon. Obviously not the best pick, but I didn't mind that part of their strategy - it was unexpected if the champs somehow had an idol themselves.
I'm surprised they lasted around half an hour in that plank challenge - I'd struggle to last a couple of minutes in that one.