Well, It's My Life and Livin' on a Prayer are both done with backing tracks as it's impossible for the band to pull out those huge backing vocals unless they hire a choir of some sort. Especially with the way Jon's voice are today, it's not really the right time to drop those backing vocals.
I guess they could spice up the outro in LOAP when the backing vocals are done, but all in all we will never see an arrangement change in those songs as long as they're going for the backing tracks. Have a Nice Day is another one of those songs with a backing track, so there's no coincidence that one hasn't had a single arrangement change live in 11 years.