Personalized Channel Emote Filter
The purpose of this feature would be to allow streamers greater control over the emotes shown on their channel, improving their chat experience, while simultaneously giving them more control over their brand.
Across all channels, and the Global Emote pool, streamers could note Emotes with "tags", a list of specific characteristics covered by almost all emotes. Examples include "Kappa", "Lewd", "Pog", or even "Hi". These types of emotes are common place in many channels' subscription emotes. However some streamers would not like to see/have those types of emotes displayed. As such when submitting an emote, you have the ability to select one or more tags to attach to it. Then in a channel's Creator Dashboard, under Preferences -> Moderation -> "Chat Options", they can block the display of certain tagged emotes in their channel. The option for "Untagged Emotes" should be included, so that bypassing the system by having an emote untagged isn't possible.
By including the tag option in the Emote submission, Twitch can verify that tagged emotes are appropriately tagged. In the "report" feature, the user should be able to choose "Misleading/Incorrect Tag", to help enforce this system.
Currently there is a way to do something similar to this, by blacklisting any common terms used in an Emote group, but this feature would improve the control streamers have by blacklisting Tags, instead of entire words/slang, and Twitch can have easier policing of "inappropriate" emotes, as reporting untagged/Incorrect/Misleading tags can be done by the users and community.
Another valuable feature with this, would be disabling emotes of a certain tag to be displayed in another stream's chat, but only to you. Now chat displays on streams does reduce how useful this could be, but it still would be a nice feature to go along with this.