Another major potential downfall is the negative feedback loop of high powered accounts running bots autovoting on specific accounts, regardless of the quality of their posts. It's impossible to enforce any kind of a bot ban, due to the realities of the blockchain. But there has to be a way to reward intelligent human curation. Right now there is none. Rewards for curation are pitifully small, unless you have very significant amounts of SP. And in that case it's clear a lot of people are happy with just automating things and keeping the wealth within a small circle.