Our current landing checklist has nearly the same items as the OPs,
cabin report
start switches
speed brake
landing gear
flaps
Only the last two have to be answered by the pilot flying, the other ones are in the area of responsibility of the pilot monitoring. The checklist has to be completed above 1000ft, otherwise it is a mandatory go around. To construct a stabilization problem out of answering one more challenge than the old checklist seems to point at a lack of basic flying skill or rather bad training.
@FlightPathOBN, is flaps 15 a normal landing flap setting for your operation? It is not currently approved as such in JAR-land, only flaps 30 or 40 are approved for normal operation, flaps 15 only for non normal config and even there it is replaced by flaps 30 for the normal one engine out case now (to enable one engine out CAT IIIa autoland).