There are good examples of formats everywhere. It’s not that hard to find one that works, modify it slightly, and get it to work for your business.
Modifying a format isn’t a problem. Making a mistake with a format isn’t a problem (unless safety is at stake).
What is a problem though is changing a format, getting feedback that it’s a failure, and then doing nothing about it.
Just one example here – With us being maybe a game or so away from the end of the hockey season, I have to say…please NHL, change your playoff format. It makes no sense.