That is a pretty good solution to the relevant tags and spam issues I was worried about. Good thinking there. One half of my issues gone.
The single conversation is still a big problem for me. I really like being able to have conversations within a specific community and get specific angles on a topic. I also like to look at a conversation on the same topic in different subreddits to see how different communities react. It's not to say that one way is inhertly better but more of a personal preference.
Maybe if you could tag the root comments the same way? So when you come from browsing #formula1 you see #formula1 tagged comments first? And when you start a new root comment it defaults to being tagged from where you came from? But you could also add #funny if it is a funny comment? That could be cool
To get two conversations it could just be posted twice with different tags? It's then up to the poster to decide in that case, not sure if that solves your problem.
The single conversation is still a big problem for me. I really like being able to have conversations within a specific community and get specific angles on a topic. I also like to look at a conversation on the same topic in different subreddits to see how different communities react. It's not to say that one way is inhertly better but more of a personal preference.