With the LCD shield plate removed, we get our first glance at what we believe is the 3D Touch IC:

343S00014 (Naming scheme is very similar to other Apple ICs, but the jury is still out on the manufacturer)

By the way, we want to (again!) send out a big thanks to our good friends at MacFixit Australia for letting us use their office in Melbourne for the teardown. They stock Mac and iPhone upgrades/accessories, and also carry our iFixit toolkits. Thanks MacFixit Australia!