He's best ability is playing targetman with his back towards the goal. with a player like suarez around, and the long ball capabilities of pirlo, pogba and to a lesser extend, bonucci, think of how this could improve us. basically you can start counters with a long ball to llorente, who can lay it off to suarez, or to one of the upcomming cm's.
Not to mention, vidal, pogba, marchisio, actually can cross. suarez, can coss a bit.
What we do often, is have the wingback push up very high, and then lay it back to the supporting cm, who crosses it. I can only see us do that more often with llorente.
Now i do like the nani idea, but here is the problem. Llorente is not a massive goalscorer perse, he's good at it, but he's best with another striker around. With 4-3-3 nani-llorente-x, we basically rely on llorente scoring, and the midfielders
in a 3-5-2 we'd be having llorente, and suarez, and the midfielders.