This is an incredible simplification.
If we follow the 90-9-1 model: 1% of reddit's user base contributes new content, 9% interacts with that content, and 90% are lurkers and consumers. The 'vocal minority' are the content creators and contributors.
Reddit has hardly changed in its existence. Things like a search that works or reasonable moderator tools have been promised for years to no avail. Reddit has never had any decent product leadership, but their attempt to reign in control of content has been disastrous.
Moderating content outside of removing illegal content is a really slippery slope. It's incredibly difficult to get content standards right. Reddit, as it becomes more mainstream, seems like its trying to get content standards under control, but the cost is immense and might eventually end up alienating its userbase.