You could end up drawing 2 fractals, or 2 of the said card you need to fractal, and having say 3 fractals in a deck, would and could net you six with the current numbers, so that you can use fractal more often.
Thats how I saw it anyway. Also something I didn't think of, drawing 2 towers could be OP when combined with Fire, I say could be because it adds 4 more on that turn then 2 extra each other, again doesn't seem like THAT big a deal but who knows.