That’s an interesting thought. I would definitely use Animoji more if they were images instead of videos.
Good news: They are!
While composing a message, go to Animoji and make the expression you want. Then either tap the Animoji and it'll show up in your upcoming message or drag it into the messages window as a sticker. You can pinch to scale and rotate the sticker.
Apple should redesign the Emojii input window with just a small set of categories.
- Recents and Favourites (show up in the main window)
- Characters (all the different animals and characters, including yellow smilies)
- People (Just basic people that are customizable)
- Hand gestures
When you select a character, make the expression you want like you do with Animoji today. If you want further customization, allow you to add features like hearts or tears to eyes, question marks over their heads, etc. For people, allow customizable hair, skin colour, and clothes that identifies their profession. Your recent customizations show up in recents so you can use them easily. Your most used ones show up as favourites.
As for hands, the TrueDepth sensor can be made to recognize hands and reflect them as customizable emoji on screen. A simpler implementation would have you swipe through gestures like on Apple Watch.
For all remaining emoji, iOS could build its own on the fly through suggested emoji based on what you type. Flags and other objects/food specific emoji would be suggested while you type.