I mean....I know that the difficulty going up means more ppl are mining, means better decentralization, etc. But FUCK! Mining profits keep getting smaller and smaller! 
It just mean the mining will be concentrated into cheap electricity places like China. It happened to the btc mining.
ETH goes to POS miners wont be needed anymore. the diff bomb was implimented so devs are forced to code faster and acomplish POS? to get rid of miners ?