It’s even easier now, you just swipe along with the home indicator right or left to go between apps. You can even go back more than one app, not just switch between the two most recent. Looks like an awesome feature.
More than half the time when swiping with the home bar I go too far and it goes home. Also requires pausing. Old method was one easy gesture. Gonna take some time to get used to being without it.
We have an even better gesture now instead of it though. Admittedly, I never used the 3D Touch app switcher on my 6s Plus. Why? I'm right handed and couldn't reach over the left edge of the screen. Doing so with my left hand was awkward and unnatural for me.