Base on what I've heard, I see big problems here
I have a huge problem with PASSENGER jets being used as a training ground of this nature. It's one thing for one pilot to check another out to keep him up to date, and even though "the guy in training" seemed to be experienced, he was NOT experienced on 777, and the results speak for themselves.
Regardless of various computers, "cruise control" and gaping at the girls, somebody needs to fly the damned airplane, or in this case, LAND it.