This stream is really not doing it for me. Way, WAY too much yelling and subscriber song shit. It's like watching Twitch Stream #1343. I know shit sells because Youtube and Twitch skew teen/younger, but EZA really should be above this.
I think they may need to have a discussion about subscriber recognition in the future. It is nice to give recognition, but that kind of thing can be a little distracting (the Maximilian stream can often be a little difficult to watch because of that stuff). Though it may not be as much of a problem when they are more established; we will have to see.
Beyond that, the rest of your criticism seems to be that they are enjoying themselves. That... is sorta who they are. It is also why so many people are supporting them.
The "shit sells" and "should be above this" comments seem unnecessarily hostile and cynical.