Saw the programme & thought it was reasonable.
Elderley/children/babes in arms were missing, but maybe their was a reason. Eg didn't want to hurt anyone.... as would happen in real life !
I've done that evacuation myself, but in the old sim. This involved an old style over wing exit door. Very small and very heavy. Was also single aisle. You should have seen the carnage....
The real benefit of the Cranfield sims is analysis of video to see peoples benahavious, and to see who get out from where in waht time. I don't think they can justify the 90s rule using such sims. Just not accurate enough.
See a lot worse on tv regarding aviation...