Enhanced Offline Map Layers Viewing

I used to have Trimble's Map Maker Pro app for my ipads until they discontinued support. One feature I thought was very useful was the ability to download say a topo map and an aerial view at the same time of the same area. Gaia GPS has that already. Then there was a slider that allowed you to go from viewing 100% topo on one end of the slider to 100% aerial image at the other end of the slider in real time while viewing the map/aerial image file offline. You could get any percent of the topo/aerial as one faded in and the other faded out as you moved the slider. You have a similar map layer feature with opacity set and fixed during download for the premium subscription. I was hoping perhaps in future releases that you might consider adding this very useful feature that would expand upon the fixed opacity feature you presently have.