Presently the witness voting system multiplies the advantage of substantial stakeholders 30x over lesser staked voters.

Given Steem's situation has evolved from when the founders held the stake they mined, and now that stake is no longer in the hands of the founders, it's best to remove the mechanism that allowed them to exercise instant governance of Steem at their sole option, which is what the 30x votepower did.

Theoretically the community could band together and prevent that stake from completely effecting control of consensus witnesses, sooner or later. In reality one stakeholder will be focused on a purpose, while hundreds or thousands will be diverse instead, and will be very unlikely to focus enough to successfully oppose that stake if it is deployed malevolently.

Tron could sell to Goolag, and then we'd end.

Representing stake 30x does not increase the range of stake represented. It simply increases the advantage large stakeholders have over lesser stakeholders by 30x.

It's a vast increase in security - not a decrease - to change witness voting to 1 Steem = 1 vote.