If you're not thinking about Bitcoin for the long term, you're in the wrong place.
Is ever-growing blockchain problem solved? Yes, see Factom, invertible bloom table
Is ever-increasing electricity consumption problem solved? Absolutely not an issue. Energy consumption is the tradeoff for trust and security
Is ever-concentrating mining power problem solved? Solved? By what metric? You realize mining is more decentralized than it's probably ever been right? Look below
June 13 2014
December 26th 2014
Sorry, but you seem to forgot tag.