Many good points ICE and welcome. The common denominator is still SAS, be it maintenance or their specific operating conditions or even just bad luck. They have taken the right action for the airline but it risks unfounded damage to the overall reputation of the Q400.
RAFMAN
I would not elect a gear up landing. Unlike the alloy props of old D8s the carbon fibre prop disintegrates causing lots of damage. Pictures from Dowty of the interior of the first SAS incident tell us that there is a high likelihood of fatality. Large carbon fragments penetrated the cabin and damaged seats. Trying to do a complete power off landing with both engines shut down and feathered does not sound advisable.