Finally finished watching this! Pleased with the ending, but Wilf might have won if he hadn't massively overplayed his hand. Simply sitting there and pointing out that Kieran was a sore loser, rather than carrying on with all the histrionics. That said, it was 100% obvious that from the start there must have been a male traitor, so Hannah/Meryl/Aaron should have worked out that Wilf was a traitor by now.
Had to LOL at Wilf claiming he was really happy he'd lost - bullshit!
I do think that genuine secret voting would be better, even us viewers could easily see what names people were writing on their slates all around the table.
So for any future contestants - if you're a faithful, just play dumb and follow the crowd. If you're a traitor, vote off anyone who suspects you ASAP and then persuade the remaining gullible faithfuls to vote off the other traitors.