I haven't seen the finished product, have you?FSX and 99% of all previous flight simulators do not use sat images for scenery. All previous versions of Microsoft Flight Sim use ground altitude data to create the surface mesh. They then use vector data to lay out the major roads and coastlines, minor roads and water bodies are less accurately placed. Major landmarks like important buildings and bridges are hand modeled and placed by MS, these were called "hero landamrks" by the MS Aces team in the past. Finally, the ground textures and 99% of the buildings are what they called "autogen", meaning they are procedurally generated and placed. They mimic the real world but in reality they have no connection to how the Earth actually looks. It's a complicated magic trick to approximate the world.
Where the new MFS is different is that its using actual sat images to texture the Earth as it looks in real life. Then MS is using AI routines to model and place actual color and shape correct buildings, roads, vegetation, coastlines, lakes, rivers, railroads, everything where they truly belong. This is the first time this has ever been done and the game world in the new MFS will be incredibly accurate to the real Earth. You'll be able to find your own house and driveway in the sim.
Now, when it comes to weather and snow, what makes it so much more complicated in the new MFS is the sat images themselves. When you changed the seasons in your FSX last night the sim simply loaded the appropriate color changed autogen textures it has stored on the hard drive. They don't look like real life but they randomly approximate it. With sat images there are no season correct images to load, they don't exist. This is why modeling seasons with sat images in a flight sim HAS NOT BEEN DONE PREVIOUSLY, because the sat images do not exist.
And yet, MS has found a way to do this with the new sim. With an accurate just like real life model of the Earth. For the first time. EVER. My best guess is they are using a mixture of complicated shaders and AI routines to modify the sat images on the fly, it would be super interesting to see exactly how they pulled this off.
If you don't see the difference now between seasons in FSX (and all other flight sims) and the new MFS then I can't help you anymore, sorry.
I don't require your help either so keep that dillusion to yourself.
Don't guess about features if you don't know.