Well, it was over powered, really. I'm still on patch 1.34 and to me at least it still functions like it used to be. Maybe they fixed it in 1.36. I'd assume it would've been a store content patch, tho, but I haven't gotten any of those lately...
I personally think it's just ridiculous you can put a baby in a swing and leave it there 24/7 all alound in a locked room all alone and it has maxed needs. Just imagine an abandoned baby in a dark empty room giggling to himself, as happy as ever, there's not a hint of realism in that.
I don't like "overly cheaty" gameplay, so I soon stopped using the swing. I might actually use it, if it's changed.
But I still must say it shouldn't fill the hunger or hygiene, that's just stoopid!