Ethereum developers are a good team, they are not sitting still. They are working on improvement. Now Ethereum is going through bad times. But let's not draw conclusions and wait for the transition to the POC. This, I hope, will happen in early 2019.
What do you mean about POC, i never heard about that but the ethereum network has already planned to be replaced with hybrid system that used POW combined with POS to determine how much total supply that will be generated by the miners. that's what i know about the next update.