I love snap and have found that it is better than scratch in almost always. However when I go to drawing sprites/backdrops I find it really tough that I can not see the real time drawing updates I am making and have to click "ok" to see how my work fits with my layers. I really wish there was an option to allow for realtime drawing update to Stage. Thank you!
It is known that the snap paint editor really needs work. For now, you can use an external image editor, like pain.net, gimp, or photoshop (I also hear microsoft paint got an update to add transparency and layers...). These have layers, which you cab utilize to kind of preview the image while you're editing it, by importing the other images onto a separate layer, and then edit the costume you're working on.
That's why. (Personally, I like Win 10 better. The requirements are actually the same, they just upped it ridiculously. With some registry editing, you should still be able to get it. (I use Linux, so I don't have to deal with Microsoft's Shenanigans.))