While snow depth would be nice, I'm not upset and I'm very very glad they were forthcoming about the lack of snow depth. While it was probably possible, it would have taken a lot more resources to create that snow depth-- in an aesthetically pleasing fashion-- than in previous versions because of the way the game engine is set up.
P.S. It's not "paint" because it's all just pixels anyway! There is no cookie spoon. There never was any "real" snow. As it is there is no depth or texture to the grass as well.