The advantages of a short working limb is that you have less mass moving forward, and less mass weight in the limb to stop.... the disadvantage is getting an archer with long draw length and over stressing the limbs.
a lot depends on the design of the limb, and exactly where that working limb is located in relation to the fades or wedge. The taper rate of the cores, and how much preload is built into the limb are determining factors also.
Who ever came up with the statement "Cores don't matter" in a fiberglass or carbon backed bow is a silly rabbit.
Kirk