Being able to hit where you are looking with a sharp broadhead is indeed more important than FOC, and heavy weight arrows, ect. Good arrow placement, well tuned arrows, from 40 lbs or so and you will have no problem on deer sized game.
Through experience, I found that arrows that were on the heavy side, always performed better in hunting situations. The newer thinking of high FOC, only adds penetration. Through the years, my draw weight has remained the same, but my arrow weight has increased, as well as FOC.
Penetration was never a problem, but now it is rare for my arrow not to be in the ground at the site of a hit. Trajectory may suffer at longer ranges, but I have found myself looking at real life shots beyond twenty yards as being too far, so trajectory doesn`t come into the equation for me anymore.
Of all the recurves I have ever owned, I have never had one that did not shoot the best with "heavy" arrows.
A high FOC, isn`t really beyond basics, and it doesn`t add too many variables either. Its just newer basics. If you are using carbon arrows, you will probably find that they like high FOC.
I like a heavy arrow because it makes my bow shoot quietly, it absorbs as much energy from my bow as possible, and when I do hit an animal, I have confidence that I KNOW it will do what I want.