Didnt Sony get the disparity by buying studios?
The way it works for Sony tends to be...
They'll work with a company to make a game exclusively for PlayStation. That game ends up doing well, or they feel they have talent. Then they buy that company and cultivate them. It's like with Media Molecule. They were shopping around their LittleBigPlanet idea (Nintendo rejected it). Then Sony saw it, loved it so much they eventually purchased Media Molecule. Now they cultivate them.
It's not "hey here's a company known for making tons of games everywhere on every platform, so let's buy them so they stop making that popular game series for Xbox!"
There are a few exceptions, just like there's a few exceptions for Microsoft in reverse. But the overwhelming take away is that Microsoft feels this is the type of strategy that works for them. There's certainly an argument to be made about whether this is really negative for gamers or not, but I do interpret it that way. I have much less respect for a company who refuses to cultivate their own studios and games at the wide scale but continue to try to snatch major franchises from the mouths of other consoles just so they don't have it.
I am against Sony's exclusive DLC deals, same as I am for Microsoft. And I'm against Sony when they do deals like this one. I just think it's unhealthy for this industry.