I´m checking NG QRH now,
¨One Engine inoperative landing
Condition: Landing must be made with one engine inoperative
1- Plan a flaps 15 landing
2- Set Vref15 or Vref ICE
If any of the following conditions apply, set
VREF ICE = VREF 15 + 10 kts
-Engine anti-ice will be used durind landing
-Wing anti-ice has been used any time during the flight
-Ice conditions were encountered during the flight and the landing
temperature is below 10ºc.¨
I don´t know others 737, but we land with FLAPS 15 with an engine out landing for sure.
I think this is because the sweep angle, it is not the same as others 737. Perhaps the wings work differently than the old 737 with a thin film of ice.
I hope it helps!