Supernatural - New Regulars?

I'm up in the air about it. I want to give it a chance because who knows...it might work for the show. But the other part of me says that it's amazing just how it is now and adding 2 regular female cast members could screw up the whole show. I heard they're adding them for Jared and Jensen's benefit so they won't have to work as much. I mean, that's not the whole reason but I heard it was part of it. And that would be good for the actors but who knows if it will be good for the show. I didn't mind Jo on the show...but only as a guest star. I think Sam and Dean are fine as the 2 main characters but I'm willing to give the new characters a chance. I hope they aren't love interests though because that will screw up the whole concept! If the show stinks with them on it...I'm sure they'll know. I can't wait for season 3 though! :)