I like the 3D Touch... problem is I always forget it's even there, so I don't use it much. Just can't seem to make it a habit.
I think one of the reasons is a lack of consistency across devices.
If iPad pros had also been given the functionality and you could use the same actions across devices it would become natural over time. If it only works on some devices, people will tend to adjust to the lowest common UI features across devices.