What can Sony do? They can release far more games like this and focus less on console ports and cross play.
This is the first high quality original Vita retail game since Gravity Rush back in June. And before that, the last big high quality exclusives were February launch titles.
Sony also needs to advertise games like this more. LittleBigPlanet Vita ought to be a system seller, just like Gravity Rush and Uncharted ought to have been. I can recall few if any ads that emphasized a single game title.