I agree completely. But I think that we need more than just a rating system, and I think something is in the works.
There is no way Epic intend to just leave it like this. We need a proper site, not a launcher, with more or less all the features of similar sites.
I’d say do something like the nexus mods site but make it look a bit more professional. Needs rating, comments, proper information on engine version and a gallery where you can add as much pictures as you want and videos.
Also force proper descriptions and technical information, like poly count for models and texture resolution, how they thought it was a good idea to leave that out is beyond me.