All true, but the first thing I was taught when flying instruments, was trust your instruments! Those purple lines would have almost certainly saved this crew and GLBAL.
Perhaps, but if the PF wasn't capable of an effective instrument scan anyway (since they crashed this would seem a reasonable assumption) he is unlikely to have been able to follow the purple lines on the FD either.
I think, nitpicking aside, we can all agree it was a very avoidable accident in which two pilot's professional standards were found wanting.