Maybe re-shaping some of the fairways by letting the grass grow higher in certain areas could help. You could create distinct landing zones this way. If the rough grass is tall and thick enough, it would essentially prevent a run up since you're not allowed to trample down your lie. It could also affect your angle of release. This would be more of that natural OB that is talked about. Like in golf, the rough isn't as easy as the fairway to hit from, but it's in bounds. Maybe this could have a similar effect.
Of course, this also brings some negatives into play, too... lost discs, more time searching for lost discs, snakes, tics, etc. It just seems like a simple way to possibly improve the play.