As far as I know, the "side-slip, crossed controls during approach," "crab until flare, with rudder in the last few feet" - and even "plant it with some drift on" techniques are all taught and used.
Rudder yaw can lift the upwind wing (yaw/roll coupling) at the worst possible moment.
Which is appropriate for a given aircraft type or situation depends significantly on the aircraft geometry and ground clearance, and the possibility of a wing-, prop- or engine-strike if touching down with one wing low. Thus it is not one-size-fits-all.
It did occur to me that if this West Atlantic crew is rated for both WA's jets and ATPs, but had mostly been flying the jets the past few months, they might have "reverted to type" unintentionally under stress.
The ATP looks like an aircraft I would land in Xwind using crossed-controls/sideslip all the way to touchdown on one wheel. But the manual may say otherwise.