bascially the binding is there to hold the handle together. The amount bound on the blade itself will not really help the handle stay in the blade.
Weight isn't really an issue with the glue and binding, it sometimes is with grips [as a bat maker]. You make a bat and then someone requests the heaviest grip known to man.... You put your head in your hands and sob, "where will I find 1.5oz now!!"
The said the binding, grip etc is your counter balance and helps you to balance the bat, so it is both a pain in (No Swearing Please) and beneifical at the same time. The other thing binding helps with is the whippy, stiffness handle debate!!!! This is dependant on the binding type used though