There are many problems why citing stats can be non-conclusive. One is that the stats are always selected to prove a point. There are usually other stats that can be cited to prove the opposite.
Here are some stats to consider. In the four starts that CL has, all against FBS schools, RU has scored 88 points or an average of 22 points per game. The defense has given 110 points or 27 points per game. An indisputable fact of football is that to win you must score more points than your opponents. Even if it is not the QBs fault what the defense does, you still need a QB that can score more points than your defense is going to give up.
So with our future opponents equal to or better than the last 4, let's see how RU's 22 points per game of offense stacks up. Here are the number of average points scored by our remaining opponents (against FBS only).
Indiana 33
OSU 34
Michigan 29
Nebraska 33
Wisconsin 27
Army 21
Maryland 19
Therefore with our current offensive production we can expect to beat Army and Maryland, although MD will have a different coach. For Rutgers to have a chance at a 6-6 season and a bowl game, one of two things has to happen. Either the offense has to increase its scoring from 22 points per game to at least 30 points per game, or the defense has to decrease its points allowed to 21 from 27.
Bottom line is, no matter what other statistics you cite about the QB position, whoever it is has to put a lot more points on the board, regardless of what his completion percentage is. In case you have not figured it out, points win games, not completion percentages.
Personally, I think this may be something that HCKF has not yet figured out.