One is the asymmetry, which is the better one, but it has weird assumptions about personhood - reasonable views either seem to suggest immediate suicide (if there is no continuity of self and future person-moments are thus brought into existence, you are harming future-you by living)

I'm not sure I remember his arguments relying on those assumptions in his asymmetry argument. Maybe he needs them to justify not committing suicide, but I thought the badness of suicide wasn't central to his thesis.