Latest updates improved network and speed on the old UI. However, there is hope a new UI style on some subs and it is really buggy. The comments are a swipe up panel over the video content and it often can't scroll. It also doesn't take you to your comment directly from notifications. Also it often won't properly swipe photo albums, so you end up on different app pages instead of seeing the next photo. Mobile devs need to embrace the art of simplicity and consistency because this is a mess.