Fortunately, YC folks have you to advise them. I often find myself in the predicament where I need to discuss an idea/ get some feedback / advice from someone who's familiar with the startup scene. Friends - family are too out of touch with tech startup world to provide any relevant,useful input.

I'd say YC should start like a monthly session (paid) where a limited set of entrepreneurs can get advice/input? Maybe far stretched considering your time constraints, but just thinking out loud.