Why?
The NTSB will thankfully divulge the CVR transcripts and the entire decision making process in audio form will be revealed
So we will all see what happens under extreme high stress, smoke & fume filled, perhaps high heat seating positions, possible incorrect use of interphone/speaker switches, loss of FMA awareness, CRM breakdowns (understandable here - for example, how can the other pilot confirm QRH items being done correctly if you cannot see the Overhead Panel?), situational awareness being reduced are all there waiting to happen.
Could we have done better?
Maybe they just crashed legally following all the rules, SOP's, FCOMs, QRH's, etc. because we all know the DISCO SMOKE in the sim (if working) ain't the same here.
Not mention only 2 crew to do the workload of at least 3 in this situation.