well they sing Bad Medicine still... It rocks because of the guitar and drums but listen to it from CD.... and you know the difference.
And I'm not saying that they should chance the whole set lists, just few songs.
Many guys have said on this forum that when they have been on Stones's or Boss's gigs they haven't recognise even one song...
If you come to Jovi's concert you will hear all the classics even though there would be 4 unusual songs.
The point is that when you come to Jovi's show, it doesn't matter are you hardcore fan of just a regular friend of live music, the number of songs you recognise is closer to 10 than 5, which isn't self-evident while beeing in Boss's gig...