Just to throw in another 2 cents, the limited panel skills referred to above, once ingrained, really help you to 'reverse engineer' an idea of what's going on outside in the event one or more instruments, or parts thereof, start displaying incorrect info.
In some of the bad accidents where even with 3 or more attitude displays, wrong assumptions have been made about attitude leading to disaster, those abilities would (I believe) have led to better outcomes. Easy to speak in hindsight, I'm sure, but if the big bright AI in front of you is telling lies and the little unobtrusive one in the middle is correct, then the ability to mentally work backwards in the power + attitude = performance equation and work out one to believe is gold.