Okay, I shouldn't keep digging this hole, but let me make my opinion more constructive. I was pretty tired when I wrote the original complaint, was more grouchy than I should have been.
First, the RAW-SNAFU that was the subject of the misplaced soil tiles is what it is. It's one of the many reasons I dont like to edit raws for the sake of graphics, because it can lead to unpredictable results. I don't want to check compatibility between an actual mod and a graphics set, or worry about a utility screwing it all up.
Second, on the tile backgrounds, the CLA set looks GREAT in any of three seasons. Most of the sets with solid color backgrounds look good under some particular circumstances.
But they come at a cost. And that cost is that they look worse in other circumstances, or that they make menus and text look odd, or they bollocks up the world-map, or whatever. And also, I think DF's use of variegated ground tiles is brilliant and unique in roguelikes, and unfortunately lots of the solid color backgrounds or textured sets throw that little bit of innovation away.
That said, it is totally fine that many people decide that trade off is worthwhile. Great! I do not want to detract from anyone's enjoyment.
And there is a reason that there is an Init setting to turn off the varied ground tiles! Even though it's my favorite thing, there are other people whom hate it! So, clearly, my opinion is not the end of the road. There are room for multiple styles, views, whatever.
What's more, the actual CLA tiles are some of my favorite tiles. I personally prefer the Myne set, but there are specific things in the CLA tiles (such as the military dwarf, and the super genius <> replacements) that I bring over because they are such subtle changes that add such huge value.
Anyway, that's more than enough of that. Back to your regularly scheduled programming...