I knew you would like it. However this is one of those few changes that actually favor game balance instead of destroying it. Besides, it's not the core ruleset we're talking about here. You almost managed to get me confused. Almost.
Still, it's unrealistic that the characters can carry 3 or 4 heavy weapons, 2 armors, a ton of ammo, grenades, and stimpacks, and be able to fight as if they were carrying nothing apart from their weapon. The only RPG i've seen come close to 'realistic' inventory management was Deus Ex. It had really strict size (and weight perhaps?) limits and if you wanted to carry even two heavy weapons, you wouldn't have any size left at all. And still it was somewhat unrealistic. I don't think you want Counter-Strike sized inventories, do you?
You want the rules to make sense? Me too. But having every thing you kill drop their stuff and then being able to carry inhuman amounts of thrash just doesn't make sense.