Just saw this, you've unfortunately come at a very late time when it comes to the expectations people have for a created park.
If you released this back when the game came out, nobody would be complaining about it. You should take a gander at some of the parks others have made and you might get a better idea on what people expect now-a-days.

for example: http://skatefluckit.com/showthread.php?t=12753