My top 3:
1) Always on Display
2) Always on Display
3) More icons per row/column on screen
Seriously now, other OLED phones have had AOD for years. I don't wanna have to pick up or tap on the screen just to know whether I have a message or email. Or have to poke around at my Apple Watch to find it. Quick glance at the phone sitting on the desk should provide this. Also, the increased icon density because, come on. We aren't all 70 and need big, huge icons. At least give a third option along with Standard and Zoomed, maybe call it "Dense".