It would be interesting to be able to export a forecast, either in JPG format (for a specific timestep) or in GIF format (to display a dynamic forecast), as other sites like WXCharts have. This would allow forecasts to be shared on social media, for example. With a basic layout containing the minimum necessary information, I think it would be a good upgrade!
It would also be nice to have a geopotential height chart. While we can use geopotential height isolines, it is not possible to show temperature at 850 hPa and geopotential height isolines at 500 hPa, as the data can only be shown at the same altitude.
Salut