Honestly i was looking at Destiny 1 Character creation and even the Human Female's look pretty.. Everything just looks better compared to Destiny 2's dry bone faces.
If Bungie ever allows you to change your characters appearance again i hope they work on this.
Also maybe allowing helmet off toggle in Strikes/PVE only related content would be good?
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Lighting and colors. D2's graphics overall just look faded and washed out. They aren't appealing to the eye. D1 had much more vivid lighting and tones. It highlighted the details in characters and armor.