I guess it depends on what you think of Lennon' solo career -- consensus seems to be that, while his first album with Yoko was decent, he didn't really record anything else coming close to great until the last decade or so.* In that vein, I can get behind praising the album -- like his best recent work, there's no attempt to be deep, the acoustics rock, and the guests don't get in the way (the duet with Gaga was actually some of her best work)...
*I've heard a smatter of people praise Imagine as his best solo work, but I don't get it