Why is that lazy? The spell in both its description and mechanics has you summon floating weapons to mimic your own attacks, and that’s a perfect method to visually depict that. There’s not really any reason to make a new animation for it when we already have something that matches the aesthetic and mechanic of what the spell is going for.
I do think it looks a little silly that Bone Shield will pop up on them, though. Since they aren’t actual entities that mobs/players can attack/kill like they used to be and BS has no real benefit to provide them, I’d be fine if it was tweaked to get rid of that.