I'ts no doubt about the fact that Ya Yas is their best official live record so far. Though Ya Yas is a great record and probably is considered one of the best live records in rock'n roll history, it could have been done even better... First, it's too short. I've read somewhere that Jagger originally wanted it as a doubble live album with one side capturing Ike and Tina Turners support act. Also there are great songs like Satisfaction that did not make it on the record.I bet Decca has something to do with this.
Second, all the overdubbings do (IMO) take some of that cool live feeling away from it. Keith singing back up on Street Fighting Man, really... I want to focus on his guitar playing, not his singing. You know, it's a song were you want to be thinking that his pulling out the best on the guitar, and not having the time , or capasity to sing perfect on top of Jagger
To me Ya Yas is not a great record because it's brilliant put together,but because there are some live versions on it, that are so well played and arranged that thei're even better than the originals!