I looked at the guy's comments. And while very low effort, they are original (not botted/copy pasted) and respect what he's commenting on.
I just think posts per day should be limited and comments should have a max power reduction and/or cap for self-voting. Also, to stop sock-puppet accounts... and tbh stop cliques from only voting each other... Votes towards a specific account should have diminishing returns over a certain amount of time. So if bob upvotes jane every post. By the week's end his vote towards her is diminished (until it regens). But his vote towards fresh faces or people he hasn't voted for in a while is unhindered.
Those are some great ideas.