I believe Ecological Challenge is a better phrase and a better description. Why? Because it gets to the heart of the matter. The globe, the earth itself, doesn't care if things get warmer or change. But the lifeforms do! And yes, the only constant in geologic timeframe is change itself. The problem is all of the environmental variables are changing at one time. The give and take between all of the non-living and living systems aren't regulating themselves effectively or quickly enough. So there is a new ecological balance to be struck.
For me there is no going back to some pre-industrial eutopia, but rather a question of how do we set out to a new future balance. And if this is truly a crisis, then we admit defeat. Rather I hope we all see our current state as an Ecological Challenge unlike any other.
