If I get windshear I'm mashing those throttles into the EICAS. What is this BS "graduated" approach to using power in a windshear. You don't pay for the engine hours and stress put on them from max power, you are paid to keep people alive.
You have no way knowing how bad it is or how bad it can get. You might just be encountering the edge of a stronger microburst event that could get really bad really fast. I'd rather at that point have as much speed and altitude as I can get.