As you can see in the image the 4 emotes in Destiny are assigned to each button the on the D-Pad but what I suggest is assigning the down arrow on the D-Pad to all emotes. When you press down on the D-Pad it opens up a circular menu that enables you to choose which emote you want to use to epress yourself. Doing so opens them up to more than just 4 emotes and gives them access to use the rest of the D-Pad. Thank you and have a good day