How about a post outlining some of the flaws of DPoS that we have witnessed since 2014 and maybe some ideas on how to address them.
More votes than top witnesses - Allowing a large stake to effectively centralise and control the blockchain (as we have witnessed here on STEEM)
Bribery / Corruption of Witnesses - Where witnesses offer a kickback to voters as a bribe to vote them in (or than relying on merit). We have seen this on other DPoS chains, leading to unreliable block producers being elected and then poor performance of the overall network.
I'm sure there is more....
RE: In the Beginning, There Was DPoS