AIA is a crowd favorite, but they've played it A LOT since 2012. They played it on the ADTOE tour, the 30th anniversary tour, the 2nd USA leg of the TA tour and now on this one. It's too much already.
If the reason for ditching Don't Look Past Me is that it's not getting the sort of crowd reaction the band wants, ditching a song that gets a great crowd reaction (whether or not the song has been played a lot recently) is not a good alternative. On the other hand,
if, as you posited, they ditched DLPM in order "to shorten the set," then it certainly makes sense to
consider other options. However, the band might reasonably value retention of a song that gets a great crowd reaction over retaining an obscure song that doesn't get as good of a reaction simply because a minority of fans are interested in seeing that obscure/rare song played. Ditching AIA is only "a better option" if the band values playing an obscure/rare song over getting a better crowd reaction.
I don't have any skin in the game because I've already seen the show with DLPM. However, if I had been given a vote, I would have strongly preferred AIA over DLPM.