The addition of the Emote Library that is coming soon is a fantastic addition, this is great for solving the issue of disparity between partners and affiliates on emote variety, without undermining the parner program and is a fantastic compromise.

I would like to suggest the addition to the Twitch API to allow for enabling and disabling of active emotes from the Emote library via a privlaged API call from a token with sufficient privlages through oAUTH.

An example of the proposed usecase would be 4 API calls:
-Activate Emote [Params: Emote ID, (Optional: Emote Slot)]
-Deactivate Emote by ID [Params: Emote ID]
-Deactivate Emote by Slot [Params: Emote Slot]
-Replace Emote by ID [Params: Emote ID to Find in active emotes, Emote ID to replace with if Param 1 ID is found in active emotes]

• Activate Emote would add an emote from the emote library by specified ID to the first free slot on the channel's active emotes, or if specified would overwrite an emote in the specified slot.

• Deactivate Emote by ID would remove an emote from the active emotes by specified ID if present in any current slot, if emote ID not found, would do nothing or respond with an Error code.

• Deactivate Emote by Slot would deactivate any active emote found in a specified active emote slot, If slot is already clear, would do nothing or respond with an Error code.

• Replace by Emote ID would search active emotes in slots for a specified emote ID, if found the slot containing the found result would be cleared and then a emote from the emote library specified by ID would be activated to the specified slot.

Programatic access to these functions would allow for great viewer interaction by the creation of immersive experiences allowing viewers to use channel points or other events monitored for via IRC or the pubsub API, to trigger changes to active emotes without disrupting the viewing experience by requiring human intervention by the streamer or another user with privlages to swap emotes.
This would also facilitate the ability for channels that play a few different games or perhaps playthroughs such as variety streams to increase their appeal by creating emotes that are themed around current games or ongoing themed streams, which can then be automatically swapped in and out via the twitch API.

This is an amazing addition you've come up with here for the emote library and I would love to see this included programatically in the API for Follower Emotes, Subscriber Emotes and Bit Emotes ideally, but at the very least, subscriber emotes.