The strength of the fediverse is that there can be a right wing fediverse, a left wing fediverse, a centralist fediverse, yada yada yada. Entire networks of different, unconnected instances can exist. There will probably be instances in between that act as bridges or for gathering stats.
It will be interesting to watch, but at least people will be able to join the instances with communities they like. The problem of course is that echo chambers are more likely to evolve, but it's not like that isn't the case right now.
And once we get instance bridged with the dark web, it could allow content from countries like China, North Korea, Iran, and other places that don't want information getting out.