You guys aren't really showing "Last Night on Earth" much love. Look, it may send a million times better with piano, but that song is absolutely gorgeous. Just listen to "All My Loving" by the Beatles, and tell me they don't mirror each other. I love this song, and my girlfriend and I hope to dance to this song at our wedding. It's a beautiful acoustic version, and the live video they released is one of my favorite versions of that song ever.
I also love Whatsername. He did a great job singing that one.
Another thing I love about the acoustic versions, or just them live in general, is watching Billie play older stuff, and seeing how they change them up. In a way, it is as if they are playing it the way they wish it would have been on the album. You have to figure that when writing and recording songs, there is a lot of hesitation and finally the producer is just like, "It sounds great, but we gotta move on." Well, Green Day has made changes to a lot of the songs over the years.
One thing that always cracks me up is this idea that some people have about recording music. They imagine that a song is recorded and then they make the right changes to it, and then BOOM! it sounds perfect. This isn't true at all. Generally there is a ton of second guessing and dispute. In the end, it all comes down to (time x money/stubbornness = a new song).