The sad thing is they should have expected it a long time ago and should have prepared something to counter the problem, unlike now.
U know that ETC Dev and Community mostly against fork like Ethereum fork before.
So they will not giving any change in this neartime until something really urgent need to do.
I seriously doubt they will move away from POW algo. They already implemented MESS to protect the network from future 51% attack and then the Thanos hardfork to further increase security and mitigate the risk.
I think they're done and have no further plans for upgrades until the next successful attack