Allied vs Soviet in yuri's revenge is balanced if super weapons are turned off. A lot of the time the specific map dictates which faction has more of an advantage. (I.e. Dune Patrol Soviet map, Reconcile Allied map) That being said if super weapons are turned on Iraq has more maps overall where they have an advantage over Allied. Probably somewhere around 65 - 75% of maps are soviet. With them off it's closer to 50% Allied maps and 50% percent soviet maps with many maps where it doesn't matter what you pick.
*one side note though* Since supers are off ban France since they can be overpowered on some maps. Also ban Yuri for the same reason. Ur left with a balanced game
ALSO PLAY WITH MULTI ENGINEER ON HOLY SHIT