I think one way to combat mods deleting content people actually want to see and ensuring that Voat remains self-policing is to institute a post reporting feature (I looked for one and couldn't find it) and then making it so that mods can only remove posts that have been reported. Obviously posts should be reported for being spam or for breaking the rules of a sub.
I understand that this system won't be perfect thanks to alts but it should cut down on some mod bullshit and reinforce the idea that mods are only curators of content and not in control.
At the very least I think a "report post" feature might help. Apologies if there is a report button on posts and I'm just not seeing it. I only see a "report spam" button on comments and not posts themselves.