Search Game by Genre
Currently when you go to Mixer.com you immediately see the Featured group and right below that is the Top Games. Both of these categories are dominated by FPS games of some sort. The MMORPG community on Mixer feels very very small relative to the FPS community. To solve this, what if below top games was "Top Genre", or even just the ability to search for streams by genre of game. Mixer is slowly moving out of "that platform that only streams BR games." I think that having a genre search would massively help speed up that process of making Mixer a streaming platform for any game of your choosing, whether you're a small streamer or large streamer.
Large streamers can stream MMO's because they already have their viewers which if you ask them, they mostly got their viewer base from playing BR games in the beginning. With genre searching, smaller streamers would have the ability to skip out on having to play BR games and move straight to playing MMO's to get their viewer base.