Titanfall's console exclusivity apparently had nothing to do with Xbox One's cloud features, but rather console sales forecasts.
According to EA's Chief Financial Officer Blake Jorgensen, "I think you should assume that we made that decision when it was back a few years ago when we decided to go exclusive. We had some forecast at that time from where we thought both Xbox and PlayStation would be and that's what we based our decision on. I think we're still feeling very comfortable with that."
I don't know about you, but it sounds to me like Electronic Arts was expecting Xbox One to be the more popular console. According to current sales figures, that doesn't appear to be the case. That said, Xbox One has still been selling incredibly well, so I'm sure EA isn't too unhappy with its decision. After all, the Xbox platform has historically been home to the FPS crowd, so it just makes sense.