Of course there is the absence of witness accounts, no video of the accident as it occurred, and other differences from other similar events.....such as the in the other accident a few days before this one.
Witness accounts always engender discussion as they can vary greatly and of course watching a video of something happening presents a great many opportunities for discussion.
The float discussion was just one topic that is of course relevant and as we have seen leads off in several directions as it should.
In time there will be yet more such issues that shall be ripe fruit for examination.....including what caused the aircraft to wind up in the water.
What lessons are learned if there is no discussion amongst professionals of the factors surrounding a crash?