Sadly, no new features are introduced in this update, including video recording, which Hollow Knight on Nintendo Switch seems to lack for some reason. As for which ones are cleaned specifically, you can see the patch notes below. That version has now received a new patch that cleans up some of those bugs.
Team Cherry’s Hollow Knight is an exceptionally polished game- especially given that it was made by fewer people than you have fingers on a hand- but even so, it has a bunch of bugs (no pun intended), including in the Switch version that launched last month during E3.
