As yet I don't have the album but I heard one of the songs from it on
NPR's website; they did a segment on it a while back. The album sounds
useful for as they sad, getting insight into Dylan's creative process.
That what is useful also about the Bootleg Series.

I'm looking to Dylan's releasing a new album of all new songs. There
was a time when he released one a year. Maybe with age he's slowing
down. But even at 66 he's still the man.

Ron