Haven't noticed #1 but I love the new share sheet feature. I often text with the same few people, sharing links, images and what not, and this thing has really sped up that flow. Also I think the risk of accidental sharing is mitigated somewhat by the fact that you're taken to the compose screen and actually have to press send – it doesn't happen right away and gives you an opportunity to back out. This I also find extremely useful since I often add comments to whatever I share.