Just saw this very cool tweak in Cydia and had to share it with you all. The tweak is called Appendix. What Appendix does is adds 3D Touch to the folders. Now this will only display the fist 4 apps in the folder so that’s something to keep in mind when arranging the icons in the folder. 

This tweak will work with older devices you just need to have RevelMenu installed or some other 3D Touch enabler tweak. Personally I don’t see why this was left out of normal 3D Touch features. But now we have it. So get to Cydia and get Appendix for free.