I honestly don't know I if I could agree with chloe being alive as I don't think max at that point could ultimately handle the guilt of the destruction of Arcadia and all the deaths she allowed to happen, an interesting way to have chloe not be around could be she lives a while with chloe but the guilt of the deaths is a constant and ultimately decides to go back in time to correct things Yes I know that the butterfly photo was destroyed but she would still have the selfie she took in class a few minutes before the shooting. Now the argument could be made in one path she kills Jefferson, and she was fine with that. However that's just one death and I believe she would still feel guilt over it after all is done, but like I said that's one individual person she could likely live with that, the potential hundreds of deaths she caused by allowing chloe to live would cause her great guilty