I wouldn't say underpowered Kraco, It's more like balanced now, UN got 28 GNX and CB got One Fully Operational Gundam "Winged", Powered Uped Exia/Transam, Damaged Drei, Hi-Damaged Lockon, and Bankai-less Tieria.

If everyone gets Powered up, I would even things, and what I expect, is that the CB mothership gets some serious firepower from the upgrade.