Copy and paste on the channel name would be great, and the ability to save names to the channel library, that way you don’t have to rename channels when you paste/upload them from the library.
Honestly, even just 2-4 more characters, I’d live with smaller text if it meant I could get more characters. If I only use 6-8 characters, then have it automatically format to a larger text for those who need larger text for visibility.