I play the game, and I've watched a zillion speedruns and challenges.

Any% focuses on "the fastest way" to win with no caveats, and it seems like the best route is solid.

My suggestion is an Any % route, but you are required to collect EVERY gold coin that appears without your input. So, boss coins, enemy coins, coin blocks, hidden coins that appear when you stand somewhere - not required. You just have to beat the game collecting every passive coin (if you do nothing, they're there) in it.

I thought it might inspire new Any% routing.

Is this a terrible idea? If so, is there a way to adjust the rules to make it work so the challenge is fun?