Emotes are a key part of twitch, to the point that you can often convey more with just a certain emote than with a message.

Many people would love to see emotes displayed in the maximum size in chat.
I'm guessing there are probably some limitations in in-line emote display tied to text pixels or something (either for practical reasons or esthetic reasons)...
...but some platforms have a solution for this, and I'm hoping it can be implemented on twitch.

In Discord, in-line emotes are displayed small, similar to Twitch, however, when ONLY emotes are used, they are displayed at full size.
People constantly use emotes as separate messages to follow up their text to get emotes to show up nicely,but more often than not just the emotes are used to communicate.
The better emotes show up, the easier it is to use them, and it really can set the tone for a community.

I hope that a proper emote size display is doable to program as long as there is no other message text.