* He sees the strategic brilliance: Haymitch knows that the only way to truly win the Games is to create a narrative that the Capitol can't control. By having both tributes survive, he forces the Capitol to play by their rules and makes the rebellion's message of love and defiance even stronger.
* He understands the power of the "star-crossed lovers" narrative: Haymitch recognized that the "love story" between Katniss and Peeta could be incredibly powerful and make the Capitol uncomfortable. This was his plan all along.
* He cares about Katniss and Peeta: Despite his gruff exterior, Haymitch genuinely cares for the young tributes and wants them to survive. He sees a lot of himself in them, especially Katniss's resilience and Peeta's kind nature.
* He knows the implications of the "double victory": Haymitch knows that the double victory is a huge blow to the Capitol's authority and a major victory for the rebellion. He's aware that this could spark change and inspire others to rise up.
So, Haymitch's reaction to the double victory is a mixture of relief, pride, and a sense of cautious optimism for the future. He knows that the Games are far from over, but he's hopeful that Katniss and Peeta's defiance will ignite the rebellion and ultimately lead to a better world.