How about the elephant in the room - the extreme disparity between the vote weights (both upvotes and downvotes) between people with larger holdings and those without.

I don't think I would be downvoting somebody that has huge SP as they can pretty much ruin any post rewards i have pending with very minor, and to them, insignficant votes. This is a problem on the platform that needs to be addressed. Anyone with money can pretty much take over and push their content to their top by self voting with big money and unless anyone else with money wants to take them on (leading to flag wars as we've seen in the past), they'll be getting away with it