For the exSFO legs, getting in earlier than the posted schedule seems okay, although I suppose a 4:50am arrival (potentially earlier) may not be ideal, and could lead to a later SFO departure for that flight. For the exHKG legs, the morning flight currently leaves ~11:15, so presumably that would remain through the DST changeover. For the evening flight, seems like a later arrival in SFO doesn't change much - you get home a bit later, and your connection to a redeye is just a bit shorter.