rudderrat
How do. It is especially important in emergency situations that the "other stick" be unavailable, visually. It is a distraction, a potentially lethal one.
If things are bad enough in the cockpit to doubt your counterpart's actions, it is CRM that must rule, not a "second guessing" that is a detriment to one's own responsibilities. Everything up to the simultaneous (and Dangerous) actions was defensible, from a command standpoint. Imo.
I might be wrong, but at this point I believe it might have been Airbus' purpose to isolate the two sticks, and if so, I can see why? Only one can LEAD, and only one can CONTROL, at any given time. It is at the point where these separate functions start to "Blend", that Satan starts to grin?