The FlightAware data isn't particularly accurate, and the update frequency nowhere near fast enough to get good information (vs. FDR).

For the less sensationalist view of the crash and analysis, see the AVHerald information [1]

[1] http://avherald.com/h?article=464ef64f&opt=0

That graph doesn't seem very meaningful. It compares the descent with the a perfectly smooth curve, but there's no indication of how much variation you can expect in normal landings. It would be much more interesting to see that descent and the ten before it overlaid, for example.