To be honest, it was a mismatch of expectations we have based on prior knowledge of a medium, and what the game had actually to offer. Just like you know that after being 45 min into a movie you're reasonably not even close to its ending, it didn't even cross my mind that what I was seeing was the game finale.
I sat down there, looking at the screen like a fool, not understanding that the game had ended. I won't deny it, I wanted to bring Lester back home, through many more adventures! :)
It’s a more thoughtful, open ended, resolution. One that leaves you asking questions rather than nodding in conclusion.
Lester has escaped. He’s not alone anymore. He’s (potentially) sacrificed himself for the freedom of another who helped him.
Does it wrap everything up? No. Does it have to though?