Automatics suck.
Why double clutch. Just float the gears. I never touch the clutch in a semi except to stop and start.
........jump in a ol' 3 stick Mack for some shiftin' fun!!!!......shift in a turn was always fun with your left arm stuck through the wheel!!!
Eaton makes a great transmission, but it's automated - not automatic. Think taking a manual transmission and bolting a controller on it to shift it for you. Same lag in power between shifts (not smooth), but arguably much less work and driver fatigue than a straight manual transmission.