I agree, if we didn't have bid-bots, circle-jerking would return as the biggest problem.
There are several options on the table to increase accountability of voters. E.g. higher curation rewards and free downvotes. Many witnesses claim to support these initiatives but have yet to act on anything. There is also Steem.DAO, which could encourage initiatives.
Some of the Dapps help support new users. I post using actifit every few days. Actifit are great for distributing rewards fairly based on activity. I'm sure several of the other Dapps do that as well in a similar way. There are still opportunities to turn things around.