Well, I'm definitely on minority here, because I just love TOAC, it's one of the best short-songs Maiden done after the reunion (right there with Rainmaker, Coming Home and Wicker Man for me). Heavy, amazing solo, catchy riff and chorus. Great Unknown is a nice song, yes, but it's just...grey. I mean, I like to hear it, but it's definitely not the song that stands out in an album. It's like BTOATS: a cool song, it's cool to hear, but it's not the best thing made since the wheel. In my experience (this is completely subjective), it's just a meh song: good if there, I wouldn't shed a tear if it wasn't. SOTV I don't like, though. It's not my most "unfavorite" song of TBOS because of the uninspired Men of Sorrows.
Not a word against Hallowed being better than Wrathchild, though. But, hey, it's the band's call, they are the ones that'll need to sing and play the same song more than 20 times, not us. And I get the hate on Wrathchild here (it's a band's forum, obviously everyone here'll have a thing for B-side and obscure songs. I'm no exception on this), but think it out: it's a catchy song. You bang your head, you jump around, you scream the chorus, it's a metal concert in a nutshell. Easy for the band, enjoyable for 95% of the fans. I totally support they playing it, it's a better stamp than stamps from other bands (I'm looking at you, Nothing Else Matters).
Overall, I don't care about this setlist too much, since I'll not hear it. But it's a coin toss if I actually had tickets for a concert: I love Hallowed, but I understand the drop; no one can actually be bored with Wrathchild, except if you set your mind for it. Wrathchild is Early NWOBHM 101; I don't like or dislike TGU, so I would just stay there and enjoy the beautiful new backdrop; I would be upset about TOAC being dropped (my 1C song in TBOS, 1A being TRATB and 1B being IESF). And y'all must understand something: this is a summer tour. Quick leg, far from being a world tour (although some bands seems to call a tour World Tour if it includes just the US and western Europe), it was clear that they wouldn't make a revolution in the stage. It could've been worse. Our british friends are up to a great experience, this stage is one of the best of the last times.
Now, if you excuse me, I'll prepare a prayer for a late 2018 World Tour that don't limit itself to São Paulo and Rio. Or that it does, whatever, I'll attend anyway.