FOC is more important in target shooting than it is in the majority of hunting applications. This due to the fact that the normal hunting shot is within 25 yards. If you get into a hunting situation where trajectory on very long shots becomes a norm (such as out west), then I would worry more about FOC. The weight at the front of the arrow is to facilitate proper flight on the downward trajectory. I could go into more detail but, I'd probably confuse you more.

Understand your application and then strive to meet the needs of THAT application.