I disagree with the comment, that Schneider was "unplayed". Not only did I play him myself quite frequently, I've expected one in my team for every boss-map.
I think this nerf is an interesting mechanic to nerf, but it might need some more finetuning. The drone should draw more aggro and have more hp in my opinion, that would even it out in my opinion.
I like that he gets even more damage, since some other weapons are starting to do more damage than him.
It's a same they fixed the killerball bug, now the weapon seems too weak.