Struggle was a poor choice of word. But the fact remains, a twin on one engine is operating in a regime for which it is designed. A 747 on two, not so much.
A better summation of your opinion
Most of the data I can recall where more than one engine lost significant power,. were at conditions where light loads, time to dump fuel and runway in sight or time to make several restart attempts This leaves the major problem as the pilot workload not within normal training. But other than the normal "what-ifs" of PPrune I don't see any relationship with the successful air-turnback of this thread