I am not an expert on the topic but I had to go through a lot of content to compile 5 reasons why 2018 is Steem's year. One the resources I went through was by @steemitblog, the Hardfork 0.20.0 Velocity proposal.
Reading your post reminded me of following things.
- Discounted account creation
- Burning Steem for account creation
- Remove account creation with delegated SP
- Remove vote dust threshold.
I think I have linked the right resource for anyone who wants to study further. Witnesses will come up with a viable solution I am sure.