I did think Deborah handled the presentation well, but I agree with it being a little 'premature' since it is based only on statements and 'observations' before both CVR and FDR have been analysed (unless, of course, a 'sneak' view has been had). We must treat the 'information' released as preliminary and not jump to conclusions.
The NTSB are pretty much revealing what they know as they find it out. I wonder if this transparency is for reasons of political/diplomatic sensitivity, because it's a foreign carrier? As in, showing the world that they're not gathering facts in silence then holing up in a room to present a doctored summary?
I also wonder if there's extra sensitivity because it's a Korean carrier, albeit South Korean? Tensions between the US and North Korea probably don't need the weight of an extra feather.