We don't want Cores completely gone. We want them out of [b]Infusion[/b]. It has been proven that the cost's existence is meaningless. You can bypass it entirely by not Infusing at all or by using the exact same weapon/armor piece that you want to use. The problem with the latter is D2's spectacular RNG. You could go months without getting anything other than Leg Armor and Grenade Launchers, which is rather frustrating.