in my opinion:
1. get rid of most of the grass and leaves. when playing against bots it was very annoying because they could see me trough it. against a player it wasnt that effective, but its still not fun when most of the map is covered in tall grass.
2. some fixes in map design. i can't name all of them here, if this discussion gets anywhere i'll post. but for now a simple one: make spawns not as close to each other. getting into a gunfight can happen VERY early, even before i can take a good position.
3. stone and sand. it has the usual problem of people being able to surf on them, rather than use them for walking and getting up somewhere.
4. more details on the back of the map. if spawn points were tweaked, it'd be an essential change. currently the side is used basically never, if it was a place that could benefit some strategies i'd give a lot to the map's feel, competitiveness and gameplay.