Customizable Emote Section
Scrolling through all of the available emotes (especially on mobile) is a hassle. The frequently used emote section isn't that helpful towards this issue either.
I'd rather be able to customize an emote bar full of my favorite emotes, or even have multiple customized emote sections to sort them out quickly and efficiently. Perhaps consider allowing users to name the different custom emote sections. I would actually prefer removing (or having an option to remove) the frequently used emote section completely.
I think just making the emote/sub emote layout a bit more customizable overall would be well-received. It would be more personalized and user-friendly.