Able to flag your channel for help by Twitch Staff
I think it would be a fantastic idea for the ability for creators to flag their account as needing help from Twitch staff and I will elaborate an example that a friend (and person I moderate for) is going through right now.
He's currently being prime botted (where someone uses fake prime subs to get the streamer into trouble by doing this and then reporting them), now he's obviously not doing this for himself but there are people out there who do, so a good way to distinguish this is to allow creators to "self-report" their channel so that Twitch can intervene and remove these subs.
He also gets view+followbotted by malicious actors trying to get him banned, so being able to make Twitch aware of this helps make it clear he is not responsible.
I know he is stressed out about this behaviour is going to lead to him having his account banned and he's a fulltime streamer and relies on Twitch for his income.