Sort:  

It has to be sped up, but also more efficient at finding bad actors. This isn't an easy one to solve, but Steemit Defense League is getting 1-3 new accounts from the Steemit Faucet for free to just go around mass flagging people. Getting them removed is harder than making the account in the first place.

More signups would just mean more churn, retention has to be addressed first and foremost.