As it stands it looks pretty bad for the crew.
We still don't have all the info and I can imagine scenarios that make it less damning
for the crew.
For example, if the speed was decaying as expected while configuring then the thrust levers would be where they were expected to be. If the training captain suffered from a subtle incapacitation between 2000ft and 700ft then I can see how a new/inexperienced F/O could be distracted enough to miss the airspeed dropping through VRef as he figured out what was going on with the TC.
I'm not suggesting that this is a likely scenario, but it is not impossible, and at this stage we simply don't know.
Framer