Moderator and duration tags would be a really useful adjunct too; it’s a good point you bring up. Ideally, the duration would be visible to the user being timed out, and both duration and moderator would be visible to other moderators. A distinction between timeout and ban is really needed too.
Considering that chat is one of the hallmarks of Twitch, it would be really great to see some new development in the area, as not much seems to have changed on the front end in the past year.
My biggest point is though, that in the case of lost or stolen moderator credentials, there’s no solution but to contact staff and ask for assistance, and hope that they’re able to put the pieces together after the fact.
EDIT: To clarify, I mean in a case where you don’t know whose credentials were stolen, just that they have been. Though rogue moderators are still an important case point, since it’s the same deal.