I really really like that you guys want user feedback. And at the risk of sounding like a broken record, I absolutely love Cake as is. All of my suggestions are tweaks rather than “what was the team thinking?” overhauls.
Sometimes, I want to express “that was a really amazing idea and I need to spend some time thinking about it before I respond.” Sometimes, I read something and I want to express “I’m not sure what to make of this.” In both scenarios, the only option is 🤔.
The emojis that I use most often are
🙂 (IMHO, a good default choice)
🙃 for when I’m amused
👍 agree with the user’s point
🎯 ultimate compliment, brilliant and on-target post
👏 for when the user has said something moving, meaningful or has done a kindness for another user
❤️ Response to sadness experienced by a user. Sympathy/compassion
🚀 I have no idea what the official use is, however, I use it as step above a thumbs up. Or just to change things up when 🙂 is feeling like a mechanical response.