Well, let us get talking about gameplay again for a second, and I'll give you my thoughts.
We don't know much about the sword controls, but we do know some about the gun and grenade controls.
If the controls are set up as is for the guns, I would rather use the X360 pad than the rev remote. The whole setup seems a little gimmicky to me to be honest. So you can twist your hand sideways and go gangsta style...is this anything other than a novelty? Also, using the revmote to lob and toss grenades doesn't seem much more than a novelty as well. For example, you could use one of the triggers on the X360 pad for throwing grenades. Tap on the trigger lightly to roll a grenade and hold it down to throw it. Also, the feel of the weapon firing is better on the X360 pad using the trigger to fire. You can use the trigger for varying fire rates, and coupled with the rumbling motion of the pad gives you a more solid feel of firing a weapon. Holding down or pressing the A button to fire doesn't sound too exciting.
I think with the rev remote the sword play mechanics will work out much better than the gunplay mechanics. Wish I knew how those worked.