Remove or change time for changing username You can mistake while typing the username or figure a better one after changing. I don't see any good reason why it is here. Also 6 months seems to be a bit long time. Even youtube allows to bypass this limitation for example by resetting G+ account.

Subtitles & Break partnerships Please add subtitles and break partnershipes, because them need to avaliable for everyone.

Hype button So you can have all your hyping needs

chatoroom add a community chatroom so we can all talk

Being able to upload GIF's as profile pictures. Adding that feature to profile pictures can actually increase creativity of a channel.