It'd have no karma system, so there'd be nobody to say or do things to artificially inflate votes.

There'd be subcommunities but they'd be decentralized from eachother so that there is no overlap. There'd be a central hub for you to navigate with that'll take you to where you want to go.

There would be a focus on privacy for sensitive communities. Like for example, if there's a mental health or depression community, any outside view would be blurred and you'd be unable to interact with the community unless you're registered and proved a set of credentials so that you're not there just to gather ammo on some people or risk being problematic for the sake of the community.

There wouldn't be a thing like on Reddit where, if you delete something, you can see it again through archives. Once it's deleted, it's gone, out of sight and out of mind.

And unlike Reddit, I'd prevent the abuse of alt accounts by actually installing verification systems through registering. It's amazing how ignorant they've been on their registration system.