As someone who's been in the community to various degrees since 2015, I wholeheartedly agree that this change would be to our benefit; there's no reason for only some games to be split from the umbrella label and I doubt Twitch would want over 12k categories added with more every day. It only makes sense that either every game gets a category, or they all share the umbrella category, and in this case the latter option is the only sensible one.
As someone who's been in the community to various degrees since 2015, I wholeheartedly agree that this change would be to our benefit; there's no reason for only some games to be split from the umbrella label and I doubt Twitch would want over 12k categories added with more every day. It only makes sense that either every game gets a category, or they all share the umbrella category, and in this case the latter option is the only sensible one.