Luke voted Harry. No idea why as if he had just gone for John it would have avoided the 4-4 tie between John & Abbey.
Maybe a backup plan in the unlikely event Daisy played her idol for John, or is that crediting Luke with too much forethought?
Usual bad gameplay on this, target Abbey instead of the godmother, and then easily give in to comments at tribal and play idol for self. On the US Survivor people have gambled more and gone after bigger targets.