Do we know yet if they preserved the CVR?
From the ATC recording, the FO sounds extremely shaky after the disastrous take-off. Not surprising, of course, but I'd be interested to know if the FO was nervous BEFORE take-off, ie was he having a bad time in the cockpit?
There's something about the Captain asking "I assume that's not enough?" that bothers me. It's a pointless question to ask ATC. I think he's really probing to see if ATC will insist they track round again to D6, or if they'll let him away with it. So I suspect he was happy to take off from D5, which would make me wonder if they did much in the way of recalculation.