Do not change the BCH algo.
Start a new coin with a mining algo that Asic technology cannot address.
There exist many ways to achieve that.
The bch community looks at the algo change just like how the useful idiots of Coretards looked at the capacity increase back then. We'll see where this attitude leads...
Changing the algo is not conceivable for BCH. Getting consensus would be impossible. (context: Just fixing the DAA reads like a civil war story.) Build better faster on new turf.