While I wish I could share your optimism for such an album, I think the shear library of varying sounds and songs that U2 have accumulated over their history would prevent this from happening. You just can't please everyone all of the time. While I think they could definitely make an album that would make a large number of U2 fans go bonkers with enthusiasm it begs the question: which type of U2 fan?
There are clear divides in the type of U2 fan. There are the "Unforgettable Fire/Joshua Tree" kind of fan, the "Achtung Baby/Zooropa/POP?" kind of fan, and now it seems like there is the newer "ATYCLB/HTDAAB" kind of fan. Vastly different tastes for vastly different age groups and generations. I just don't see them appealing to everyone.
Its a lost cause. I think in the end, they should just try to make music that appeals to THEM and let their fans sort it out.
Hopefully, you and I will love it.