Add more options to "Modify a Single Emote", it's a cool redemption, but doesn't have much to it currently.
Allow mixed modifications to combine effects.
Let the streamer save modifications to favorites for viewers to reuse.

-Color Modification: Add Hue Shift, Saturation, Brightness, and Contrast filter options.
Maybe even color key options to change specific colors on the emote.

-Masks: Expanding upon Sunglasses and Thinking, but with more options, maybe specified by the streamer, letting the streamer add custom or default masks to emotes and set the position on the emote where it should sit properly. (Maybe having a more chaotic random/default position option).

-Transform Filters: To change the image layout/position with options like Flip Horizontal and/or Vertical, Rotate, Shift, Squish, Zoom, Shear, Perspective, and Warp.