Wasn't a huge fan of "Saucerful" when I first heard the album but have grown to appreciate it. Some cool live versions too. And like I've said, in a way, it deserves at least partial credit for almost singlehandedly kicking off the krautrock movement FWIW.
The CSNY song is definitely an album highlight IMO. Probably my favorite after the 2 Stills tunes and arguably one of Crosby's best songs (not saying much but still).