Why asymmetrical ? Well, neither humans nor waves are symmetrical. So in a lot of ways asymmetry makes more sense than 'regular' boards. Plus no board is 100% symmetrical in the first place.
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This hopefully shows how the outline is blended together. Essentially taking the best design elements from forehand and backhand boards.
Here is a pic of the shaped blank before it was glassed. Shaped from a stringerless blank it was great to integrate the concaves, channels and rails. The one side has one fin and two channels, while the other has two fins and one channel. The rails are slightly different with the forehand generally a bit more pinched. The shorter backhand rail is a touch fuller as your heal transfers weight and initiates turns easier than your toeside.