That is sort of the PoW and DPoW model. Its very difficult for a minnow to get support from a whale since the whale also needs incentive to help others. If you get 3-4 whales in a group they can propel their group forward more than a group of minnows could.
If you delegated the work of upvoting good content to a group of people, you've now allowed a set panel of people to do the judging. Ultimately you end up back at square one, centralization.
Aside from that, who would have the time to sort through that many post? you would eventually need so many delegates that you have to incentivize to do something the network would do for free. In that regard, I don't think editors is a good idea for this type of platform. Instead the communities features which is coming in the next update, will solve that problem because it allows you to create a microenvironment within the steemit ecosystem.
fyi, im about to fall asleep so if that doenst make sense, reply and ill try to clear myself up!