Call me a cynic, but I guess Bruce finds it much easier to sing those than some of the songs they have dropped (e.g., Where Eagles Dare, For The Greater Good of God, The Evil That Men Do or even The Wicker Man and 2 Minutes to Midnight).
IMHO, the show looks really good but the setlist is very odd, with just a couple of up-tempo songs during the first half of the set (Stratego and Flight of Icarus). It could go down like a fart in two-man submarine at many gigs (I know many people who are not happy about getting this show instead of what they thought they would be getting when they bought their tickets before the pandemic).