It's not clear what the change is, whether it is curation by hand or some other metrics, but it's a positive change, the old Show HN was getting flooded, as recently discussed. ( Although I can't work out how to find that discussion. )
I suppose the main thing so far is https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu.... The hope is to be welcoming to new users while also nudging them toward the intended use of the site. I don't know how well this is going to work over time so your comment is encouraging!