Could you add pressure isolines, as well as wind streamlines, as persistent overlays in preferences so that they are turned on no matter what layer we wish to view? Wind streamlines for two elevations, using two colors (e.g. black and white) would be an even better new feature.
Currently the ability to see streamlines for two elevations is available in the Ventusky Android app, and it is very helpful when trying to see what direction rain and clouds are likely to move in the future.
Pressure isolines are available in Windy, but every time one chooses a different layer, they are turned off. It would be nice if they stayed on until a user wants to turn them off.