We were in a back yard comp and a guy was using his Lang 60 Deluxe. 6500 watt generator to power just the draft control! Thought he was a bit daft.
Tasted some of his offerings after turn-in and was not at all surprised by the product. DRY, over-smoked jerky. He actually thought it was pretty good.
That is my only, admittedly limited, experience with a draft control and a stick burner. I have a Lang 48 and can control temps on it quite easily by adjusting the vents, typically once up to temps I never touch them, and adding a stick every 45 minutes or so. Pretty easy.
Stick burners need a lot of air to function properly, small live flames, and IMHO a draft control will stifle the flow resulting in a smokier and smoldering fire.