Saw the Allman Brothers in August...Widespread Panic was the opening band...but that is beside the point.
Greg's singing was better than it was the last few times that I saw them. I also feel that the addition of Derek Trucks makes this line-up amazing. Duane, I feel, would be proud and amazed with the guitar work that Derek and Warren execute.
If "The Brothers" play somewhere in your area and you are a fan of great guitar playing, you should go see them. I don't think you will be disappointed.