The idea that Maiden are having a discussion about what songs to play and are considering dropping songs and only playing standards, is all in peoples vivid imaginations, as is the idea that standards are less difficult to play than deep cuts. Some standards are difficult and some are easy, the same as with deep cuts.
Also, when people are taking a pop at Bruce and Nicko they ignore the elephant in the room, that songs are at a slower tempo now because one member is always complaining about songs being too fast and as a result the band are counted in from a metronome at the studio album tempos.