I'd like them to create a version specifically for the PC, not just a port over of the PS2 version. That way you might get those little annoying things fixed like having to use the joypad to type in names in edit mode instead of the keyboard, and having it constantly telling you to press the "triangle" button to exit - I haven't got PS2 joypad, so I haven't got a "triangle"!
That and creating teams from scratch like CtrlAltDel said.
Oh, and make the refs a bit biased towards player controlled teams. Okay, it's my fault for having a tendancy to dive into tackles, but I do feel the game is against me at times. On the rare occassion a computer team gives away a foul, you almost never see them get a booking for it no matter how bad it looked, yet the amount of straight red cards I've got for "barely touched them" challenges on the halfway line is ridiculous!