Depends. Will there be some mental stability test before joining council?
Then this idea would be just stupid. Their voices are already loud, in general Blizzard's mistake is listening to loudest voices. What Asmon idea would improve whole game? Removing LFR? And Preach? Shift next expac even more towards raid logging?
Whole point of council should be to extract useful feedback from incoherent mess. It's not like devs can't read forums or discords. Pick people who catch your eye. Pick youtuber/streamers, why not, but base it on quality of their videos, not how loud/controversial/popular they are.