Well, the miners are amoral, they will do whatever makes most sense to their pockets.



Changing the hashing algorithm is probably not enough, PoW needs to be redesigned to refine the incentives. The proposed BetterHash BIP (or recent threads in Development & Technical about proposed PoW redesign) demonstrates the need is widely agreed upon. And it's important to the value of BTC that PoW is redesigned as a planned, staged, long term change to improve decentralisation of the mining network. The changes needed could be too disruptive if they are enacted on a "last resort" timeframe, there needs to be alot of discussion, planning and most of all, notice given to make it as smooth as possible.