Jill Scott was great! And so were the others (Digable Planets, SiR & DJ Premier).
My only recommendation would be less breaks or shorter breaks in between artists. Also, since you had a DJ on the roster, have him fill in for the breaks in between artists. We didn't need a break, then have a whole slot for the DJ. He would have had 3-4 slots, and we wouldn't have had to be there from 5 pm to 11:30 pm.
I sat on the lawn and this time it was great. The venue didn't oversell the lawn seats this time which was great because it was enough room to dance, walk through people's areas without intruding or stepping on their things, etc... And the lines were still long for everything (driving into the venue, parking, the line for the security check point, the line to check your tickets, the line for the food, drinks, bathrooms, etc...), but slightly less longer because they didn't oversell the venue. Very helpful! And it made for a much better, less overwhelming experience.
My only recommendation would be to add an additional screen for the lawn section, especially since there was a large black apparatus blocking the screen from where I was sitting (I was sitting in the middle of the lawn).