I'm with you on that @lacroix. In a typical 'session' at a pub, one person will start/lead a song and the others will play along. Your idea can work for this. The only part missing is being able to feed off each other. In this method the only person that can be heard is the main player on Twitch. hmmm Let's keep pushing at this. There must be a was.

Tonight at 10UTC I will be chatting about this for a little bit. "Backstage with Bucky" on the PAL Discord MSP-Waves radio. Stop in and we can throw around some ideas.