Hi mm43
As far as bodies are concerned, you can largely ignore the wind. This will have minimal effect on a mostly submerged human body. The overwhelming majority of body drift will be due to currents rather than wind. The wind component will be far smaller than the uncertainty about the velocity of the current, and so it is probably easiest to simply discount the wind this as a factor when attempting body drift analysis.
If you wished to allow some wind component, the winds were easterly rather than westerly. This would also suggest that east is the direction to search. The currents were pretty much due north for 5 days after June 6. Who knows what they were doing prior to this, but they were likely northerly rather than southerly. Hence SE is the best option - which also allows for the pollution spot if you chose to incorporate this in any explanation.
The easterly winds explain why so much other debris (which will have been much more wind effected) was found west of the bodies.
If you had some homogeneous debris (eg 20 seat cushions), then you could attempt some composite analysis. Assume the bodies were 100% current effected and the debris was some composite of wind and current, and then look for solutions. Unfortunately the debris is all heterogeneous, and hence each has its own ratio of wind and current effect. Thus the debris is really just noise, and it is best to confine the analysis to bodies (the only things which will have behaved similarly).
The bodies are all very tightly grouped together. Remarkably so after 10 days in the open sea. We know the current was pretty constant after the first body was discovered. You could speculate that the current had not changed direction a great deal prior to this - on the basis that changes in currents will favor dispersion and scatter. It probably changed speed however (slower prior to discovery of the first body) - because there is no logical explanation for the plane to have got to Takata's original position. This however is all very qualitative rather than quantitative in nature.