Not sure about the surprise in ratios. Xbox will almost always have higher attach rates for shooters than PS because the fanbases are not the same. That's why MS pay for more shooters like Sunset Overdrive, Tomb raider and Quantum Break, even though they already have Halo and Gears. It is what the X1 fanbase wants, and they will buy it in greater numbers than Playstation owners, just like JRPGs and racers will almost always have higher attach rates on Playstation.
What's the big deal? Nothing that is happening right now with these ratios is new or out of the ordinary







