Better AI, no more ground missions unless it looked realistic, I mean u fall 20 foot-high of a cliff thingy and u have the same stance as if u were walking...
More mission that makes u return to previous places like for say:
u star off the corneria from an invasion, depending on how well u did and stuff diferent routes appear, later on u hear a distress signal from corneri, u arrive and it was all a trap the main guys got you and u gotta figth on the ground, either that or try to break the trap and ge tto your ship, meaning diferent boss fights...
and please something more entertaining than hitting a boss in a certain area doing the same thing over and over...
or they could make a star wolf game, showing the past, present and future of star wolf...