Is there any thought to centralization of mining? The vast majority of miners seem to be on http://xcn.1gh.com/ with a few on http://xcn.nonce-pool.com/. It looks like we're way beyond the levels that ghash reached with bitcoin which caused such a media storm. Luckily this produced several good proposals to fix bitcoin, just because bitcoin couldn't manage a hard fork to fix their problems it doesn't mean we couldn't do that to make sure xcn is ready with all the solutions.
See http://hackingdistributed.com/2014/06/18/how-to-disincentivize-large-bitcoin-mining-pools/ for one idea.