Amazing how something is considered "crap" simply because it isn't full band.
I love full band versions, but I'm also able to enjoy the stripped down versions.
I must say I enjoy Bono's version of "So cruel" more than Edge's version of LIB. Bono's phrasing and singing is great, even though (or because?) he improvises a lot. It's an interesting version. However, I would also love to have more full band versions of more AB songs as bonus material, but I'm happy with everything they give us as extra.
Edge's version of LIB is moving, but he just doesn't have a great singing voice, sorry to say. It becomes clear why Bono is the singer in the band and Edge is only doing background vocals. I've never been a big fan of Edge's singing but I think he's perfeclty harmonising with Bono, like in the Clinton concert that took place a while ago. As a solo or lead singer, Edge just doesn't have what it takes. Bono does, of course, because he has all the experience. Still, interesting, to hear Edge's version of that song, it's a totally different take than on the original.
Bono's not a good guitar player and Edge isn't a very good solo singer. Hearing them do these solo versions makes me realise why they are in the band and why the four of them need each other.