Love to see a tap to answer like IOS, Option. Swiping annoys me to answer so lollipop days. If your out walking around easier to tap the green button to answer . The buttons are there why not just tap, swiping seems such extra work!! Maybe in update 4.0 be great. Plus sometimes takes a few attempts even more annoying , feedback for Sammy
You might be able to download an alternative phone app that offers those features, but I've never needed or downloaded one.