Because follower emotes can only be used in the channel which they are unlocked, it would make sense to let follower emotes be shaped like individual letters, since those emotes aren't able to be used elsewhere to circumvent chat rules.

Personally, I have wanted to have Tetris-related emotes for some time, but because the pieces are letter-shaped (LJSZTOI), I cannot reflect this significant part of my channel. I understand why these emotes can be harmful on other channels, but when they are restricted to just my own, I should be allowed to take the risk that people will be less-than-wholesome with them.