Better Report Feature for Harassment
There should be a different reporting feature for harassment/abuse that is separate from the normal chat "report" feature.
When someone has been making alt accounts daily for months to harass a streamer, the current report tool function simply gets the alt account banned, but that doesn't stop the harassment from continuing on the next new account.
There should be a dedicated streamer safety staff and reporting mechanism for streamers/mods to be able to communicate what they are experiencing and list out the facts and all associated accounts, so that Twitch can actually do something (like an IP ban) to prevent someone from simply making a new account to harass streamers.
The current platform makes it incredibly easy to get an alt account taken down for ban evasion, but it does nothing to change the pattern of harassment from repeating with how easy it is for the abuser to simply make another account.