I like this idea. I think it'll be great for getting new players into ladder, and at the very least I can't see how it would have a negative impact. Not only that, but I'd very much like to stop being pitted against 0 rated players as a ~1300 rated ladder player. I've all but stopped playing ladder after a month or so of serious interest in climbing it because that was incredibly frustrating. Both because I felt bad about beating up on a new player and because I'd get no rating for it, and once or twice I even lost rating which is kind of absurd that it allows such a big gap that I can lose rating for winning.
Anyway, mini rant over, I like the idea and don't see issues with it other than perhaps it's a lot of dev work.