Is ever-growing blockchain problem solved? Yes, see Factom, invertible bloom table
And where is it?
https://blockchain.info/charts/blocks-sizeIs ever-increasing electricity consumption problem solved? Absolutely not an issue. Energy consumption is the tradeoff for trust and security
Absolutely not an issue? Why do you then make an excuse in the next statement?
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
It's quite naive to think that some of the slices are not controlled by the same entity.
Sorry, but you seem to forgot tag.
99% of my posts is trolling, I use in the opposite cases.