A new concept is Ground Already Covered. Say the ball goes OB, the player can drop anywhere along the line of GAC. This is a straight line from where the ball was last in-bounds, back to where the stroke was made. (The line does not follow the curve of the flight of the ball.)
If we applied this to disc golf, it could replace Line of Play. Instead of moving back farther along the line from the target to the disc and beyond, relief would be to move anywhere along the straight line that runs from the position of the thrown disc (or last point IB) to the previous lie.
The two advantages I see are:
1. The player has "earned" the line of GAC, so it's more like play it where it lies.
2. Unlike LOP relief, there would always be a spot where relief could be taken along the line. Most of the time the player would be able to gain significant distance, because usually the GAC line would be over an IB area. But, worst case it becomes like a re-throw.