For me, one of the main advantages of an EFI Live tuned truck is having a turbo brake incorporated into the tow tune. Between that and the tow/haul mode, I hardly ever have to use the brakes descending long, steep grades. The slight extra HP with a cleaned up tune also seems to help keep EGTs low, I can usually stay umder 1150 F when towing up long grades on hot days.
2004.5 GMC SLT CCLB, Ride Rites, Turbo brake, EFI Live
2012 Arctic Fox 29 5T 5th Airborne, B&W, Prodigy
Papillon navigators Lily, Buddy and Willow