We have an official game channel on Twitch -- we have tons of streamers that play the game, but (of course) most are variety streamers.

We'd love to autohost some of these folks playing our game, but it'd be awkward if we autohost them and they randomly play :any game that's not our game:. After all, it's the official game Twitch channel!

This would be useful to any themed streamers or gamers that only play x or y game. There may be variety streamers that play MOBAS but a LoL Twitch channel would autohost their friends only when they're playing that particular game.

Game name is already in the meta data, seems like it'd be minimal effort to implement!

There are times when I don't want to load in to a new stream after the one I was watching is over.

Some examples are when I am alt-tabbed and playing a game.

For me personally, while playing a game I will always experience a spike in bandwidth usage while the new hosted stream loads in.
Not all streams will use the same bitrate either, which is a concern, however I've not had issues with that problem so far.

Another example is when I am away from the computer, viewing twitch as it were actual TV.

Then inevitably having my ears blasted off by a hosted streamer with much higher audio settings.

I overall enjoy hosting as a feature, but there are times when it's not appropriate to have.
At least not now while stream-to-stream settings across twitch are not standardized in any way.

Why do you punish large streamers with over 10k viewers that they can't raid? If it's a concern of overloading the viewer hosted, they can opt out if they don't want raids. If it's to avoid bots, maybe add a bot filter to weed out the bots so they get removed from the raid. If it's because the system can't handle that large of a raid, then perhaps upgrade the site's ability to handle it. In any case there are valid solutions that don't involve forcing a large streamer to tell their viewers who want to support the next stream that they have to leave to get under the limit allowed. I've witnessed this happen myself with my own eyes. It's not cool to have to be dismissive of part of your viewer base and limit the support given to the next person you move the streamer over to.

I'm not sure if I'm putting this in the right spot but I would love the ability to select people on the twitch team that I don't want auto-hosted. For example you're on a team and 1 member of that team is causing issues for other members and claiming they're cheating at a game without providing proof but the owner of the team has not yet chosen to get rid of them. I'd live the option to have team auto-host on but block that person from being auto-hosted. Currently you either auto-host anyone on the team or no one that is not in your personal auto-host list.