If the only option to play Marrone is when Giach is leaving the club then I'll take that option anytime, anyday.
What he does in midfield: sometimes win the ball, most of the time loses it (outmuscled). bring the ball forward just to lose it (bad dribbling, poor vision to pass, or again outmuscled). contribute only slightly in the build up play, he's got narrow vision I believe and thats all. loses the ball. and did I mentioned he loses the ball too often?