I think the solution to the problem is to make a lost ball "lost", and an expired ball, one that is able to be continued in play just with some of the properties decreased.
For instance, spin, distance, feel and durability would have a decrease percentage that equates to x per shot or per 4 shots. They would continue to decrease until the ball had 1 dot on all areas or something that made it where the ball was still better than a starter ball, or however slightly WGT figures it could be while still making sure people invest in the balls.
It would also give their sponsors increased brand recognition as the balls would be in play for a longer period of time...well, at least for most people, I tend to lose mine in the gunk at #2 Kiawiah :)