Should note that as in CFR's game, popping the hut was not a team decision, but made by the player who discovered it.
I agree that our save is still winnable, however in the spirit of SGOTM it should remain a team game. My team stopped posting to the boards weeks ago for no obvious reason. I think you're highly correct about poor management of Kyoto beyond the Osaka loss. Team members strayed too far from the goal of Astronomy. However, I think it's also important to note that for some reason, Bismarck's boundaries didn't expand in our game like they did in others. Had we met the mainland AI civs sooner, we could have come out better with trades. I still don't understand why we didn't meet Bismarck until almost 900 AD. Aside from the hut, this was the second most important thing that unbalanced the game for different teams.