In a Normal diff, the most important thing is that the distance between objects on the timeline roughly correlates to the distance between them on the playfield, so that you can always tell how long a gap is at a glance. In short, time-distance equality. It's important because players of this level haven't learned to read maps based on when the notes appear, so they have to rely on spacing instead. For a player like this, your map would be completely unreadable.
Of course, time-distance equality should also be followed in Easy diffs since they're below Normal. Hard diffs are more lenient, but gaps still need to be distinguishable from each other. In Insane and higher diffs, players can already read, so you can do whatever you need to represent the song.
