Here's an idea---not for replacing horseshoes---but for a new game and innovation that should add to viewer appeal. The game counts ringers only. And something is fastened a few inches up on the stake or laid on the ground around the stake (perhaps a cone) and designed in such a way that the only shoes showing/hanging on the stake are ringers.
The downside is that ringer averages would drop (in this game only). The upside is that all ringers are easily obsevable from a distance and players who participate in the game would not be doing anything that would hurt their other pitching---since they would be aiming for soft ringers that land about three inches up on the stake.
Horseshoe pitchers love pitching in good clay. But this is my thinking. The clay or sand are hindrances to viewing. In bowling we see pins fly. In cornhole we watch the bean bag disappear through the hole. In horseshoes we often can't tell whether or not a ringer has been pitched. I'm just suggesting a game in which ringers are visible because they alone are left hanging on the stake.