I didn't expect my opinion to be a popular one after they threw fans a bone like that. If you think the setlist is awesome, or believe it's justifiably carried by one or two songs, that's terrific. It's your money.
Me, I recently lost all financial aid and have to fund a teaching certificate out of pocket, so I've got to be extremely careful with how I spend money over the next 6 months, impacting the way I view setlists like this one. When you've been extremely fortunate to see U2 every tour, occasionally multiple times, it's easier to pass on an opportunity, even when the band is doing some things very well.
And they certainly are. 27 songs is terrific and it's bold that they are loading up their sets with new material that they are clearly proud of. The 20 minutes or so of material targeted to hardcore fans is refreshing. I would never say the current set is "bad" for a band their age; in fact, they're putting in a lot of effort to prove the contrary. It's just not to my taste, as someone who hasn't really enjoyed a U2 album since 2009.
Skipping a tour was bound to happen eventually as U2's new music diverges further and further from my tastes. Ashley seems insistent on going, so budget concerns will probably sideline me this time around. Personally, I will be missing out on 4-5 gems (if they keep them around) and a really cool screen. Fans of the last two albums should by no means skip out on this tour if they can afford it.