Fairly straight forward, but could the weather layers be “sticky”? As in preserving selected layers even when the app is restarted.
Map formats and Day/Night seem to be saved, but weather layers have to be enabled each time, which is an easy thing to overlook.
Additionally, it would be great if altitude dependent layers were set to the initial cruise altitude pulled from the flightplan, instead of FL220.
Finally, on a large screen (12.9 iPad Pro), putting the weather button on the top of the page, and the layer selection on the bottom is quite the reach in portrait mode. It would such a minor but useful change to allow either a double-tap or long press on the button to open Weather Layers as a sub-menu, like the map type and map element buttons do.
Minor ease of use features, that could streamline the UI by making every layer button function the same way.