I think we have learned enough from Reddit that echo chambers should be avoided. Fair and open discussion is possible without censorship, it just requires mods to not be children. There is the paid shills problem too. Since we are at the beginning of the Lemmy explosion and there is still much development to be done, it’s worth talking about IMO.
At the moment there is still nothing stopping people with an agenda from creating a community and then censoring its posts to fit within their narrative. Reddit suffered from this and other than making your own instance and trying to get people to move over there is not much you can do here either. If you’re struggling to think of a legitimate problem: /c/countryname can get created by person affiliated with political party x and then control the content to be in favor of said party.
My thinking is that for communities with names where its important to be impartial (like for instance a country’s name) they should have some way to appeal to the instance owner to take back the name from a mod team that you can show evidence is repetitively being unfair or biased. Something like a poll. How that could be implemented and protected from abuse, I’m not sure. For communties where its obvious its a company managing their social image, I have no problem with more harsh moderation. My main problem is political coercion and control of the media.