Would you be happy if they added a bunch of filler material and increased the length to 6-7 hours?
3 years for a 3 hour game is just poor productivity in my opinion. No matter how good it is going to be. And it's not their first ps3 game and they are under the umbrella of SSM studios
After the stories about the last guardian, i am not really suprised. Poor management is endemic at sony.