Use the feature that matches the show you already run
Co-hosting and competitive live formats are useful when you already have someone to share the screen with. Auto dubbing and expanded watch-together styles matter if your audience is bigger than one language or you want a premiere feel. Fan funding tools matter after people care, not before the first stream.
Do not rebuild the channel around a feature you saw in a keynote. Read the Live control room, see what is offered to your channel, and test one thing on a stream you were going to do anyway.