Also that doesn’t work because who’s going to be dumb enough to enter a 2 stack mode solo

They probably aren't doing that because the player population isn't high enough to split the pool like that between three stacks and mixed teams.

The population is plenty high enough and let's be honest all population issues(if they were true) are a result of the match making chasing countless players away by feeding them to stacks/imbalanced teams. You can't say ohh can't do X because Y when Y only exists because they are too stupid to do X and avoid the problem in the first place lol.

No. You're putting the cart before the horse here. My point is that until Crucible gets a proper overhaul with more compelling content/maps, drastically better lobby balancing(you even brought that up) reasons to play it (more interesting things to chase) etc; splitting the pool could negatively impact the numbers it has. If the population was so great and consistent, then they wouldn't have to prioritize connection to the point of minimizing skill-based all together. Far too often I get matched against people with KDA's way over the average on my team. That mixed with lobby balancing being total garbage has a whole lot of players just gritting their teeth until they get their pinnacles and then booking out of Crucible for the rest of the week. Just because a lot of people do that, doesn't mean the population is healthy or that the game mode is fun. You guys talk like stuff just happens in a vacuum, and just one little thing will fix the problem. It's not that simple.