A fight between Jon and Jacklyn resulting in a permanent (for this game anyway) separation just flies in the face of everything we've seen about the relationship between these two who up until now have shown an abiding and deeply in-love relationship. It does appear that there is a fight. And that she does walk away mad. And he is put out by her. But everyone here knows that an angry spat between loved ones is usually is resolved after a little time passes and allows heat to dissipate and reason to return. Surely within a couple of hours they will be back together again. Both are intelligent, both know the circumstances of their presence on the island, and both will be willing to forgive and forget. Surely.
As to the big change in the game, perhaps it doesn't directly affect these two? Perhaps it causes another to perceive them differently, i.e. Alec, or Keith, and fool him into desperately thinking he has been forgiven for his foolishness at the last TC.
Or, perhaps they use the disagreement as subterfuge to confuse those that would plot against them? Jon did get a lot of votes at the last TC, and now he is without an HI. He probably feels like he’s fighting for his life right now.
It's hard for me to buy that fight at face value, or to interpret those clues in the obvious way.
And as far as the Revenge clue goes, I'm thinking that Reed is the victim, and that it's Baylor's revenge. Or vice versa.