Ah, you've touched on something that I've been worrying about. Jared's made a great case (https://news.ycombinator.com/item?id=26557978) about how YC can grow the resources it provides to startups, but HN front page space is one resource with a hard limit. That means that as YC batches continue to expand, the percentage of YC startups who do a Launch HN is going to have to decrease.
When are we going to hit that point? We've probably hit it already. During W21 we've been allowing two YC startups to launch on most days—but I think that's too much. My gut feeling is that 2 launches a day is ok during the run up to Demo Day (i.e. a week or two before), but not during the entire batch. The question is what the criteria should be for deciding which startups get a Launch HN. In the past it was simply "email the mods and they'll schedule you". Now that (edit: close to) 150 startups are doing that in a batch, we need something else to narrow it down.