In my experience it takes quite a lot of weight to balance out a loader.
Hmmm. On my tractor the centre of the bucket is 34" in front of the front axle. The rear axle is 52" behind the front axle. Advantage: Rear axle by 1.5:1. Any weight added to the 3PH carries over 2:1 advantage at the ends of the arms and even more advantage for the centre of mass of any implement back there.wheel weights are second in line to liquid filled tires as the best weight source because they are not a stress on the transaxle. You can't have enough weight when it comes to snow activity. Weight is equal or more important than tread pattern.
Definitely not overkill.
As for the front end loader ballast the rear weight is at a disadvantage compared to the loader because the loader weight is further from the fulcrum than the rear weight. The teeter-totter principle or in airplane terms Weight X Arm= Moment or 1 in the tail= 3 in the nose (reversed for a tractor)