This insane move will cause an over-extension of credit - or mal-investment, as Austrian Economists call it - this is REALLY OUTRAGEOUS
And... suggestion on what they should have done?
It is an act of desperation and the malinvestment that you correctly point out will retard recovery the way low rates kept the economy from recovering quickly after 2008. I don't consider it outrageous at this point, but it has to be temporary otherwise it will be outrageous.