Because there are some questions around the "Last Open Tab" Quick Action, we have decided to remove/disable it for now. This will give us time to rethink this option.
Please check wether this is mentioned in 2.0 release notes and or support documentation.
Created attachment 8720738 [details] [review] Pull request
Aaron, we are not documenting this in the 2.0 documentation or What's New page.
Comment on attachment 8720738 [details] [review] Pull request LGTM
Verifying as fixed on build 2.1(1) "Last Open Tab" is no longer available in the 3D Touch menu