I don't disagree with you that 3D Touch is rather undiscoverable. However, Apple have provided guidance that 3D Touch should only be used as a "preview" of an action -- never to reveal new behavior unavailable in other places. We all think of it as right click, but Apple's guidance is very much against the notion.
It's possible -- unlikely, I think, but possible -- that 3D Touch will alleviate some of the concerns in this article. 3D Touch should ideally provide a preview of an action -- quite useful in a world without undo.
It's possible -- unlikely, I think, but possible -- that 3D Touch will alleviate some of the concerns in this article. 3D Touch should ideally provide a preview of an action -- quite useful in a world without undo.