We are in the position soon to post more details on the next upcoming iOS version. We really need to do more tests now on the different devices until we can say more.
Our biggest concern is actually the limited capacity of iOS devices, which forces us to add some program features that allows users to actually manage their scenery content. This is actually our biggest issue right now. Even the smallest iPhone 6 model comes with 'only' 16 GB and we have to make our App look good and smooth on those devices.