This is a feature on Luogu's homepage. You can search about a problem there and navigate to the problem, but you can also navigate to a random one if you click the blue button.

I think it would be cool if we can have a similar function as the random navigation one on the Problemset page. It can be random navigation to any single problem, but it can also be navigation to problems that are within 200 ratings to your current one (your rating +- 200).

I'm not sure if this will be considered as just "copying features", but if not, this feature will definitely be interesting to use and practice.