Very sad and unnecessary accident.
As some have stated,the shaking reported by passengers,probably relates to spoiler extension with landing flap.Speedbrake should not be used with flaps greater than TEN.
This airport has 7200' of concrete,less of course on the glide,and we dont know as yet about any NOTAMS.
Its all down to pilot training and this modern cockpit ethos.AP engaged,VOR LOC/GS green,and the pilot sits there and watches the speed build up too afraid to intervene(The FDR will reveal whether or not the flap load relief protection activated or not-Im betting it probably did).In desperation,he takes speedbrake with landing flap.Recovery from a fast or high approach is not a complex maneuver and should be part of any pilots make-up.In a 737 it is not a difficult procedure.Usually it stems from pilots not being trained to recognize that the VNAV profile stored in the FMC doesnt match the vectors/profile that they are being given in real time by ATC.The reliance on the automation and the erosion of traditional flying skills sets the trap very nicely.
Recovery from above the profile is accomplished by engaging VORLOC only,foregoing the profile and throwing out 30/40 flaps,and arming and capturing the GS at a lower platform.If you dont achieve the window by 500/1000 then simply perform a go-around.Tailwind and pilot skill are the critical factors here and determine the mindset.
Ive said it before and Ill say it again;pilots today arent trained to fly the plane.They're trained to program the FMC and use the automatics in a set and standard way.Fear of the QAR and these wretched SOP's divert their attention from their primary goal;FLY THE PLANE.The only relevant SOP here is the stable-approach criteria by 1000/500.If you dont meet it,go-around.