The whole point of PoS was to add security and inflation. Favoring PoW over PoS or vice-versa isn't benefiting one rich group over another.  If anything, PoS favors the 'rich'. I think there is a problem with bitcoin and litecoin when inflation through PoW slows and eventually stops completely. I think a great coin would allow a modest amount of inflation (2% or more) through PoW indefinitely (by percentage, not fixed number of coins).

I'm still wondering what disallowing consecutive PoS blocks will do aside from fixing the PoW orphan issue.  Does that mean coins could be 'staked' for much longer? How long? There seems to be a lot of gamemanship with PoS minting, and I'm not sure that fix would change that aspect... it would just change the rules of the game.