3D Touch iOS Capabilities

They are still trying to deliver basic functionality like tournaments on the IOS app. While that is going on , they have to keep up with the constantly evolving platform.
In order to keep the most people happy, they have to decide which features will work across the highest percentage of IOS releases and focus on those.
I don't have statistics but I would guess that few people have the 3D touch at the present time. So that can't be a priority.