Technically there is more control with a manual because, as far as I'm aware, all auto boxes will in some situations change gear although you haven't asked it to, even in manual mode. OK, it might not be very useful to have that extra control, allowing you for example to hit the redline and not change gear, but it is still more control.
You also have control over the clutch and can modify the speed and aggressiveness with greater detail, if you're skilled enough. Again, not necessarily very useful, but it is more control.
The main benefit I've found from using MHD on my e89 is to give myself more control of the gear changes. Previously, if you mashed the fun pedal to the floor, even in manual, while in a high gear, it would change down. Sometimes on a motorway I want to accelerate as quickly as possible without changing down. Now I can. There's no huge benefit to this, but I want to be in control, because it's my bloody car, not the gearbox's.