My biggest wish is that there’s an easy way to contribute images to wikimedia and to link them easily with osm. As soon as that’s possible, we’ll map the world much quicker and more reliable. Someone might take pictures of benches and another one will add the info if there’s a backrest from home.
I would like to see a revitalization of Open Place Reviews or something similar. When I found out about it it was already basically dead. We can already give very detailed tags on the type of restaurant and upload photos of it too but can’t leave reviews to my knowledge.
It does exist another working open source alternative, Mangrove Reviews https://mangrove.reviews/ I think it would be good at least to focus on developing and maintaining one.