I think it serves a different purpose. There are things it excels at more, and is overshadowed at others. Uriel's is better at longer ranges, while Cuboid is better closer. The increased ADS movement makes it easier to use cover and strafing. The high caliber rounds are more beneficial at mid range encounters than closer ranges as well where you are dealing with enemies that are larger and easier to hit. If I needed to choose one or the other, it would be Uriel's almost every time regardless if it didn't have high caliber rounds. The extended range capabilities that Uriel's has makes it more versatile. While the closer mid range attributes of Cuboid is preferred for me.