Features I can think of:
- a system for stricter content moderation, especially something that would automatically delete NSFW/NSFL posts,
- no direct messaging,
- some kind of tool for moderators to efficiently review content,
- multi-layered access to an account to allow for parental control,
- time management tool that would not be based on the client, but with the session duration calculated through interactions.
I’m not talking about usability, just about the foundation. Besides what others already said about why it’s not a good idea to answer your specific question regarij moderation tooling is:
Your requirements are incompatible with decentralization. Every moderation tool will have to use the network itself which means a moderation event has a significant delay in which the content has a “head start”.
There is no way to have an instant kill switch for content or a centralized gated release of content.
And at the end everyone can spin up an instance and decide on moderation, after all - and decide on the moderation rules there. This will cause an even bigger delay until the malicious instance is blacklisted by others.