Just do you know, I'm not the architect of this stuff. You're going to have to really second guess me here.. lol .. I'll comment because it is fun though. Use at your own risk!

Delegated proof of stake is about getting elected to serve blocks and get the income. Those elected don't need to spend as much, they just need to support the minimal computations, bandwidth, and storage that are actually needed to run the network. In our case, it still seems straightforward: everyone elected (the top 19 or so) does basically the same job as everyone else. This is fantastic for the reasons mentioned in my other comment, but in the end it depends on stake .. Anyone informed would be concerned about distribution of wealth and power. So naturally we need to keep seeking better reputation systems and (I would add, at scale) a individual uniqueness factor so we will have a popular vote metric. It should be much harder to buy a majority vote in something large than it is to buy a majority share in something large.

Mining is the same story. Same concerns about centralization of power and wealth. It is fun to have a mining industry and jobs but in the end it is a lot of electricity and extra hardware that is consumed. It was clear to me early on that I should look at POS .. Mining starts out with a very large decentralization but can't maintain it. It seems to be over spending. You can't upgrade a large mining network without the coin splitting and partially dividing the demand for the coin. I don't like that very much. Don't run from mining in all cases, it is still neat and serves a purpose. Steemit distributed the bulk of its initial tokens though mining for example. If you caught Steemit early on bitcointalk.org and dedicated a lot of CPU to it, you would be a whale.. In contrast, I earned my shares as a developer and early adopter and accepted shares as options in the company.

The more good ideas (sometimes alt coins) we see in the markets, the more relaxed I get about centralization of wealth and power. People are use to monopoly money where they are locked in. This is not the case now (at least it does not have to be). If some chain gets too centralized people need to be smart and get away and try something else. Even if the new chain has the same potential issue it will be a new chain potentially free of that issue at least for a while (and then one can move again). The market should identify long lasting solutions. I would diversify but not be so scared. Make good investments anywhere they can be found and always protect those investments.