Looking to the debris field of pictures below,
The model could be of a/c hit surface at approx. 75 deg. direction:
1) Eng #1 hit surface, detaches and dive decelerating from a/c trajectory speed, reducing itīs horizontal speed gradually.
2) LH wing separates, breaks and itīs "water speed braking" capabilities (due itīs still present profile despite broken) decelerates faster than fuselage.
3) Fuselage breaks and its pieces "showers" to ocean floor. Itīs parts decelerating as a function of itīs characteristics (mass and geometry) creating the debris shape.
4) Eng #2 detaches, "fly" some meters or so and dive reducing itīs horizontal speed gradually (traveling a litle bit further than #1)
5) RH wing separates, "fly" further than eng #2, hit surface, breaks and dive accordingly itīs "water speed braking" capability (RH LG mass and shape of still attached parts and panels)
IMO is more logical the a/c trajectory of 75 deg than 255.