Because of the tail strike issue, its recommended by Bombardier to arrest sink below 400 feet with Power lever movement only, as some one mentioned you are not going to fly VREF plus 7 on a day like that the thing is really speed unstable even on a calm day.
you learn quickly on the Q400 if you try to fly VREF plus a bit and power levers close to flight idle your either smashing the tail up or shattering pax teeth.