Before I got my Time 2 I had a Garmin smartwatch. I think that was similar in that frequently updating the screen led to the battery draining more quickly. The watchface that I settled on only showed the seconds when the backlight was active and that suited me fine.
I wonder if something like that is possible in PebbleOS? Can the watchface be alerted when the backlight comes on - i.e. when the watch is tapped or the wrist tilted? That would allow the author to have an option other than seconds on/off? I currently use “Quartz by Dalpek” and it’s excellent apart from this one missing feature.