The positive to signing Lussick is the aggression he brings. Sure, there are plenty of better props going around, but there aren't many (if any) angrier props, and that is something Manly sorely lack. Lawrence, Starling, Burgess, Tom T, and 35 year old Mason (Mason at 25 was a different prospect), are all pretty timid by front row standards and don't really get under the oppositions collar too much. Mason actually befriends the opposition at times.
Darcy might not eat up the yards and work himself to a stand still like say Aaron Woods, but he is cranky and will go to war in the trenches if he has to. The way he folded Lawrence like it was his laundry in rd.1 really set the tone for the forward battle in that match, and we are all trying to forget how that turned out for Manly. I think he would be a good pick up.