I can't say I'm thrilled about this. I liked Cat's editorial choices, and I liked the fact that Fantasy and Lightspeed had different styles. Now it's basically just F&SF split into two.
Also, I dislike the change for selfish reasons. Fantasy Magazine is the place where I've had the most "almost but not quite" variety of personal rejections. I've never had the slightest luck writing a story that JJA would like. Fantasy had been one of my top markets I hoped to crack some day soon, but with JJA at the helm, it's on the list of "not bloody likely" instead.