No, no and no. An unreliable first touch means that the player has to wait where the ball ends up after his first touch before he can decide what to do with it. Maybe even more importantly, his teammates can't count on it either and can't time their runs. That's not going to break down tight defences, a mediocre first touch takes space and slows it down. Ibra is getting old and stiff, but still does the job of both a finisher and a player who helps create almost all the chances. With Ibra Everton would have been top four and without Ibra United would have been somewhere in the bottom half. Conversion rate tells a lot more about the kind of chances a player tends to get than about the quality of his finishing and it's typically something that changes with a striker on a streak or on a dry spell.